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Finding the Fourth Proportional to 873,677.54, 1,205,713.79 and 491,729.06

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Solution

The fourth proportional to 873,677.54, 1,205,713.79 and 491,729.06 is: 678,607.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,677.54 : 1,205,713.79 = 491,729.06 : x
  2. Step 2: Convert to fraction form
    873,677.54/1,205,713.79 = 491,729.06/x
  3. Step 3: Cross multiply
    873,677.54x = 1,205,713.79 × 491,729.06
  4. Step 4: Simplify right side
    873,677.54x = 592,884,508,585.74
  5. Step 5: Solve for x
    x = 592,884,508,585.74/873,677.54
  6. Step 6: Final answer
    x = 678,607.93

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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.