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Finding the Fourth Proportional to 690,908.80, 953,256 and 476,106.88

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Solution

The fourth proportional to 690,908.80, 953,256 and 476,106.88 is: 656,890.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,908.80 : 953,256 = 476,106.88 : x
  2. Step 2: Convert to fraction form
    690,908.80/953,256 = 476,106.88/x
  3. Step 3: Cross multiply
    690,908.80x = 953,256 × 476,106.88
  4. Step 4: Simplify right side
    690,908.80x = 453,851,740,001.28
  5. Step 5: Solve for x
    x = 453,851,740,001.28/690,908.80
  6. Step 6: Final answer
    x = 656,890.95

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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.