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Finding the Fourth Proportional to 867,809.40, 1,301,714.10 and 447,905.40

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Solution

The fourth proportional to 867,809.40, 1,301,714.10 and 447,905.40 is: 671,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,809.40 : 1,301,714.10 = 447,905.40 : x
  2. Step 2: Convert to fraction form
    867,809.40/1,301,714.10 = 447,905.40/x
  3. Step 3: Cross multiply
    867,809.40x = 1,301,714.10 × 447,905.40
  4. Step 4: Simplify right side
    867,809.40x = 583,044,774,646.14
  5. Step 5: Solve for x
    x = 583,044,774,646.14/867,809.40
  6. Step 6: Final answer
    x = 671,858.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.