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Finding the Fourth Proportional to 620,270.10, 930,405.15 and 615,021.30

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Solution

The fourth proportional to 620,270.10, 930,405.15 and 615,021.30 is: 922,531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,270.10 : 930,405.15 = 615,021.30 : x
  2. Step 2: Convert to fraction form
    620,270.10/930,405.15 = 615,021.30/x
  3. Step 3: Cross multiply
    620,270.10x = 930,405.15 × 615,021.30
  4. Step 4: Simplify right side
    620,270.10x = 572,218,984,879.70
  5. Step 5: Solve for x
    x = 572,218,984,879.70/620,270.10
  6. Step 6: Final answer
    x = 922,531.95

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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.