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Finding the Fourth Proportional to 710,966.16, 981,122.22 and 388,668.78

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Solution

The fourth proportional to 710,966.16, 981,122.22 and 388,668.78 is: 536,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,966.16 : 981,122.22 = 388,668.78 : x
  2. Step 2: Convert to fraction form
    710,966.16/981,122.22 = 388,668.78/x
  3. Step 3: Cross multiply
    710,966.16x = 981,122.22 × 388,668.78
  4. Step 4: Simplify right side
    710,966.16x = 381,331,576,278.29
  5. Step 5: Solve for x
    x = 381,331,576,278.29/710,966.16
  6. Step 6: Final answer
    x = 536,356.86

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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.