Home / 918,007.10-1,377,010.65-386,128.70

Finding the Fourth Proportional to 918,007.10, 1,377,010.65 and 386,128.70

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Solution

The fourth proportional to 918,007.10, 1,377,010.65 and 386,128.70 is: 579,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,007.10 : 1,377,010.65 = 386,128.70 : x
  2. Step 2: Convert to fraction form
    918,007.10/1,377,010.65 = 386,128.70/x
  3. Step 3: Cross multiply
    918,007.10x = 1,377,010.65 × 386,128.70
  4. Step 4: Simplify right side
    918,007.10x = 531,703,332,170.66
  5. Step 5: Solve for x
    x = 531,703,332,170.66/918,007.10
  6. Step 6: Final answer
    x = 579,193.05

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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.