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Finding the Fourth Proportional to 351,399.98, 527,316.85 and 138,130.58

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Solution

The fourth proportional to 351,399.98, 527,316.85 and 138,130.58 is: 207,281.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,399.98 : 527,316.85 = 138,130.58 : x
  2. Step 2: Convert to fraction form
    351,399.98/527,316.85 = 138,130.58/x
  3. Step 3: Cross multiply
    351,399.98x = 527,316.85 × 138,130.58
  4. Step 4: Simplify right side
    351,399.98x = 72,838,579,352.36
  5. Step 5: Solve for x
    x = 72,838,579,352.36/351,399.98
  6. Step 6: Final answer
    x = 207,281.11

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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.