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Finding the Fourth Proportional to 873,663.28, 1,205,694.12 and 491,714.80

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Solution

The fourth proportional to 873,663.28, 1,205,694.12 and 491,714.80 is: 678,588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,663.28 : 1,205,694.12 = 491,714.80 : x
  2. Step 2: Convert to fraction form
    873,663.28/1,205,694.12 = 491,714.80/x
  3. Step 3: Cross multiply
    873,663.28x = 1,205,694.12 × 491,714.80
  4. Step 4: Simplify right side
    873,663.28x = 592,857,643,076.98
  5. Step 5: Solve for x
    x = 592,857,643,076.98/873,663.28
  6. Step 6: Final answer
    x = 678,588.26

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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.