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Finding the Fourth Proportional to 420,388.80, 580,125.60 and 229,404.48

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Solution

The fourth proportional to 420,388.80, 580,125.60 and 229,404.48 is: 316,572.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,388.80 : 580,125.60 = 229,404.48 : x
  2. Step 2: Convert to fraction form
    420,388.80/580,125.60 = 229,404.48/x
  3. Step 3: Cross multiply
    420,388.80x = 580,125.60 × 229,404.48
  4. Step 4: Simplify right side
    420,388.80x = 133,083,411,602.69
  5. Step 5: Solve for x
    x = 133,083,411,602.69/420,388.80
  6. Step 6: Final answer
    x = 316,572.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.