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Finding the Fourth Proportional to 577,428.59, 865,393.82 and 257,124.69

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Solution

The fourth proportional to 577,428.59, 865,393.82 and 257,124.69 is: 385,353.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,428.59 : 865,393.82 = 257,124.69 : x
  2. Step 2: Convert to fraction form
    577,428.59/865,393.82 = 257,124.69/x
  3. Step 3: Cross multiply
    577,428.59x = 865,393.82 × 257,124.69
  4. Step 4: Simplify right side
    577,428.59x = 222,514,114,128.78
  5. Step 5: Solve for x
    x = 222,514,114,128.78/577,428.59
  6. Step 6: Final answer
    x = 385,353.48

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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.