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Finding the Fourth Proportional to 555,147.78, 766,139.36 and 313,342.12

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Solution

The fourth proportional to 555,147.78, 766,139.36 and 313,342.12 is: 432,432.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,147.78 : 766,139.36 = 313,342.12 : x
  2. Step 2: Convert to fraction form
    555,147.78/766,139.36 = 313,342.12/x
  3. Step 3: Cross multiply
    555,147.78x = 766,139.36 × 313,342.12
  4. Step 4: Simplify right side
    555,147.78x = 240,063,732,431.36
  5. Step 5: Solve for x
    x = 240,063,732,431.36/555,147.78
  6. Step 6: Final answer
    x = 432,432.12

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.