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Finding the Fourth Proportional to 489,123.60, 732,810.60 and 419,139.60

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Solution

The fourth proportional to 489,123.60, 732,810.60 and 419,139.60 is: 627,959.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,123.60 : 732,810.60 = 419,139.60 : x
  2. Step 2: Convert to fraction form
    489,123.60/732,810.60 = 419,139.60/x
  3. Step 3: Cross multiply
    489,123.60x = 732,810.60 × 419,139.60
  4. Step 4: Simplify right side
    489,123.60x = 307,149,941,759.76
  5. Step 5: Solve for x
    x = 307,149,941,759.76/489,123.60
  6. Step 6: Final answer
    x = 627,959.77

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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.