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Finding the Fourth Proportional to 518,731.32, 776,843.02 and 429,326.76

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Solution

The fourth proportional to 518,731.32, 776,843.02 and 429,326.76 is: 642,952.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,731.32 : 776,843.02 = 429,326.76 : x
  2. Step 2: Convert to fraction form
    518,731.32/776,843.02 = 429,326.76/x
  3. Step 3: Cross multiply
    518,731.32x = 776,843.02 × 429,326.76
  4. Step 4: Simplify right side
    518,731.32x = 333,519,496,805.22
  5. Step 5: Solve for x
    x = 333,519,496,805.22/518,731.32
  6. Step 6: Final answer
    x = 642,952.30

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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.