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Finding the Fourth Proportional to 472,890.80, 709,336.20 and 429,345.20

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Solution

The fourth proportional to 472,890.80, 709,336.20 and 429,345.20 is: 644,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,890.80 : 709,336.20 = 429,345.20 : x
  2. Step 2: Convert to fraction form
    472,890.80/709,336.20 = 429,345.20/x
  3. Step 3: Cross multiply
    472,890.80x = 709,336.20 × 429,345.20
  4. Step 4: Simplify right side
    472,890.80x = 304,550,092,656.24
  5. Step 5: Solve for x
    x = 304,550,092,656.24/472,890.80
  6. Step 6: Final answer
    x = 644,017.80

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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.