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Finding the Fourth Proportional to 465,412.32, 642,345.22 and 387,764.88

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Solution

The fourth proportional to 465,412.32, 642,345.22 and 387,764.88 is: 535,179.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,412.32 : 642,345.22 = 387,764.88 : x
  2. Step 2: Convert to fraction form
    465,412.32/642,345.22 = 387,764.88/x
  3. Step 3: Cross multiply
    465,412.32x = 642,345.22 × 387,764.88
  4. Step 4: Simplify right side
    465,412.32x = 249,078,917,151.87
  5. Step 5: Solve for x
    x = 249,078,917,151.87/465,412.32
  6. Step 6: Final answer
    x = 535,179.04

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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.