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Finding the Fourth Proportional to 314,921.52, 472,132.80 and 157,068.72

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Solution

The fourth proportional to 314,921.52, 472,132.80 and 157,068.72 is: 235,478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,921.52 : 472,132.80 = 157,068.72 : x
  2. Step 2: Convert to fraction form
    314,921.52/472,132.80 = 157,068.72/x
  3. Step 3: Cross multiply
    314,921.52x = 472,132.80 × 157,068.72
  4. Step 4: Simplify right side
    314,921.52x = 74,157,294,566.02
  5. Step 5: Solve for x
    x = 74,157,294,566.02/314,921.52
  6. Step 6: Final answer
    x = 235,478.65

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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.