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Finding the Fourth Proportional to 615,643.10, 922,427.85 and 578,318.30

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Solution

The fourth proportional to 615,643.10, 922,427.85 and 578,318.30 is: 866,503.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,643.10 : 922,427.85 = 578,318.30 : x
  2. Step 2: Convert to fraction form
    615,643.10/922,427.85 = 578,318.30/x
  3. Step 3: Cross multiply
    615,643.10x = 922,427.85 × 578,318.30
  4. Step 4: Simplify right side
    615,643.10x = 533,456,906,084.66
  5. Step 5: Solve for x
    x = 533,456,906,084.66/615,643.10
  6. Step 6: Final answer
    x = 866,503.51

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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.