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Finding the Fourth Proportional to 710,862.88, 980,990.82 and 388,574.26

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Solution

The fourth proportional to 710,862.88, 980,990.82 and 388,574.26 is: 536,232.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,862.88 : 980,990.82 = 388,574.26 : x
  2. Step 2: Convert to fraction form
    710,862.88/980,990.82 = 388,574.26/x
  3. Step 3: Cross multiply
    710,862.88x = 980,990.82 × 388,574.26
  4. Step 4: Simplify right side
    710,862.88x = 381,187,781,948.29
  5. Step 5: Solve for x
    x = 381,187,781,948.29/710,862.88
  6. Step 6: Final answer
    x = 536,232.50

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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.