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Finding the Fourth Proportional to 710,641.17, 980,687.39 and 388,356.21

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Solution

The fourth proportional to 710,641.17, 980,687.39 and 388,356.21 is: 535,932.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,641.17 : 980,687.39 = 388,356.21 : x
  2. Step 2: Convert to fraction form
    710,641.17/980,687.39 = 388,356.21/x
  3. Step 3: Cross multiply
    710,641.17x = 980,687.39 × 388,356.21
  4. Step 4: Simplify right side
    710,641.17x = 380,856,036,033.41
  5. Step 5: Solve for x
    x = 380,856,036,033.41/710,641.17
  6. Step 6: Final answer
    x = 535,932.97

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1.5x scale

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.