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Finding the Fourth Proportional to 867,114.90, 1,300,672.35 and 447,210.90

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Solution

The fourth proportional to 867,114.90, 1,300,672.35 and 447,210.90 is: 670,816.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,114.90 : 1,300,672.35 = 447,210.90 : x
  2. Step 2: Convert to fraction form
    867,114.90/1,300,672.35 = 447,210.90/x
  3. Step 3: Cross multiply
    867,114.90x = 1,300,672.35 × 447,210.90
  4. Step 4: Simplify right side
    867,114.90x = 581,674,852,248.62
  5. Step 5: Solve for x
    x = 581,674,852,248.62/867,114.90
  6. Step 6: Final answer
    x = 670,816.35

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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.