Home / 918,005.40-1,377,008.10-286,918.20

Finding the Fourth Proportional to 918,005.40, 1,377,008.10 and 286,918.20

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Solution

The fourth proportional to 918,005.40, 1,377,008.10 and 286,918.20 is: 430,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,005.40 : 1,377,008.10 = 286,918.20 : x
  2. Step 2: Convert to fraction form
    918,005.40/1,377,008.10 = 286,918.20/x
  3. Step 3: Cross multiply
    918,005.40x = 1,377,008.10 × 286,918.20
  4. Step 4: Simplify right side
    918,005.40x = 395,088,685,437.42
  5. Step 5: Solve for x
    x = 395,088,685,437.42/918,005.40
  6. Step 6: Final answer
    x = 430,377.30

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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.