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Finding the Fourth Proportional to 710,861.64, 980,989.08 and 388,573.08

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Solution

The fourth proportional to 710,861.64, 980,989.08 and 388,573.08 is: 536,230.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,861.64 : 980,989.08 = 388,573.08 : x
  2. Step 2: Convert to fraction form
    710,861.64/980,989.08 = 388,573.08/x
  3. Step 3: Cross multiply
    710,861.64x = 980,989.08 × 388,573.08
  4. Step 4: Simplify right side
    710,861.64x = 381,185,948,261.97
  5. Step 5: Solve for x
    x = 381,185,948,261.97/710,861.64
  6. Step 6: Final answer
    x = 536,230.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.