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Finding the Fourth Proportional to 555,148.78, 766,140.74 and 313,343.12

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Solution

The fourth proportional to 555,148.78, 766,140.74 and 313,343.12 is: 432,433.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,148.78 : 766,140.74 = 313,343.12 : x
  2. Step 2: Convert to fraction form
    555,148.78/766,140.74 = 313,343.12/x
  3. Step 3: Cross multiply
    555,148.78x = 766,140.74 × 313,343.12
  4. Step 4: Simplify right side
    555,148.78x = 240,064,929,830.71
  5. Step 5: Solve for x
    x = 240,064,929,830.71/555,148.78
  6. Step 6: Final answer
    x = 432,433.50

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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.