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Finding the Fourth Proportional to 482,728.80, 724,089.60 and 145,768.80

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Solution

The fourth proportional to 482,728.80, 724,089.60 and 145,768.80 is: 218,652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,728.80 : 724,089.60 = 145,768.80 : x
  2. Step 2: Convert to fraction form
    482,728.80/724,089.60 = 145,768.80/x
  3. Step 3: Cross multiply
    482,728.80x = 724,089.60 × 145,768.80
  4. Step 4: Simplify right side
    482,728.80x = 105,549,672,084.48
  5. Step 5: Solve for x
    x = 105,549,672,084.48/482,728.80
  6. Step 6: Final answer
    x = 218,652.11

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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.