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Finding the Fourth Proportional to 657,820.20, 987,031.64 and 357,851.28

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Solution

The fourth proportional to 657,820.20, 987,031.64 and 357,851.28 is: 536,940.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,820.20 : 987,031.64 = 357,851.28 : x
  2. Step 2: Convert to fraction form
    657,820.20/987,031.64 = 357,851.28/x
  3. Step 3: Cross multiply
    657,820.20x = 987,031.64 × 357,851.28
  4. Step 4: Simplify right side
    657,820.20x = 353,210,535,774.50
  5. Step 5: Solve for x
    x = 353,210,535,774.50/657,820.20
  6. Step 6: Final answer
    x = 536,940.85

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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.