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Finding the Fourth Proportional to 615,136.60, 922,704.90 and 515,603.80

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Solution

The fourth proportional to 615,136.60, 922,704.90 and 515,603.80 is: 773,405.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,136.60 : 922,704.90 = 515,603.80 : x
  2. Step 2: Convert to fraction form
    615,136.60/922,704.90 = 515,603.80/x
  3. Step 3: Cross multiply
    615,136.60x = 922,704.90 × 515,603.80
  4. Step 4: Simplify right side
    615,136.60x = 475,750,152,718.62
  5. Step 5: Solve for x
    x = 475,750,152,718.62/615,136.60
  6. Step 6: Final answer
    x = 773,405.70

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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.