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Finding the Fourth Proportional to 480,126.60, 720,641.76 and 243,639

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Solution

The fourth proportional to 480,126.60, 720,641.76 and 243,639 is: 365,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,126.60 : 720,641.76 = 243,639 : x
  2. Step 2: Convert to fraction form
    480,126.60/720,641.76 = 243,639/x
  3. Step 3: Cross multiply
    480,126.60x = 720,641.76 × 243,639
  4. Step 4: Simplify right side
    480,126.60x = 175,576,437,764.64
  5. Step 5: Solve for x
    x = 175,576,437,764.64/480,126.60
  6. Step 6: Final answer
    x = 365,687.80

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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.