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Finding the Fourth Proportional to 563,209.40, 843,258.90 and 438,793.40

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Solution

The fourth proportional to 563,209.40, 843,258.90 and 438,793.40 is: 656,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,209.40 : 843,258.90 = 438,793.40 : x
  2. Step 2: Convert to fraction form
    563,209.40/843,258.90 = 438,793.40/x
  3. Step 3: Cross multiply
    563,209.40x = 843,258.90 × 438,793.40
  4. Step 4: Simplify right side
    563,209.40x = 370,016,439,811.26
  5. Step 5: Solve for x
    x = 370,016,439,811.26/563,209.40
  6. Step 6: Final answer
    x = 656,978.45

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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.