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Finding the Fourth Proportional to 710,875.20, 980,990.28 and 388,586.73

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Solution

The fourth proportional to 710,875.20, 980,990.28 and 388,586.73 is: 536,240.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,875.20 : 980,990.28 = 388,586.73 : x
  2. Step 2: Convert to fraction form
    710,875.20/980,990.28 = 388,586.73/x
  3. Step 3: Cross multiply
    710,875.20x = 980,990.28 × 388,586.73
  4. Step 4: Simplify right side
    710,875.20x = 381,199,805,066.98
  5. Step 5: Solve for x
    x = 381,199,805,066.98/710,875.20
  6. Step 6: Final answer
    x = 536,240.12

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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.