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Finding the Fourth Proportional to 710,915.03, 981,084.10 and 388,642.35

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Solution

The fourth proportional to 710,915.03, 981,084.10 and 388,642.35 is: 536,338.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,915.03 : 981,084.10 = 388,642.35 : x
  2. Step 2: Convert to fraction form
    710,915.03/981,084.10 = 388,642.35/x
  3. Step 3: Cross multiply
    710,915.03x = 981,084.10 × 388,642.35
  4. Step 4: Simplify right side
    710,915.03x = 381,290,833,607.80
  5. Step 5: Solve for x
    x = 381,290,833,607.80/710,915.03
  6. Step 6: Final answer
    x = 536,338.13

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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.