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Finding the Fourth Proportional to 710,981.35, 981,157.72 and 388,691.45

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Solution

The fourth proportional to 710,981.35, 981,157.72 and 388,691.45 is: 536,396.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,981.35 : 981,157.72 = 388,691.45 : x
  2. Step 2: Convert to fraction form
    710,981.35/981,157.72 = 388,691.45/x
  3. Step 3: Cross multiply
    710,981.35x = 981,157.72 × 388,691.45
  4. Step 4: Simplify right side
    710,981.35x = 381,367,612,931.43
  5. Step 5: Solve for x
    x = 381,367,612,931.43/710,981.35
  6. Step 6: Final answer
    x = 536,396.09

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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.