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Finding the Fourth Proportional to 472,927.20, 709,390.80 and 157,394.40

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Solution

The fourth proportional to 472,927.20, 709,390.80 and 157,394.40 is: 236,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,927.20 : 709,390.80 = 157,394.40 : x
  2. Step 2: Convert to fraction form
    472,927.20/709,390.80 = 157,394.40/x
  3. Step 3: Cross multiply
    472,927.20x = 709,390.80 × 157,394.40
  4. Step 4: Simplify right side
    472,927.20x = 111,654,139,331.52
  5. Step 5: Solve for x
    x = 111,654,139,331.52/472,927.20
  6. Step 6: Final answer
    x = 236,091.60

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Similar ratio
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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.