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Finding the Fourth Proportional to 644,087.58, 887,378.76 and 498,392.43

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Solution

The fourth proportional to 644,087.58, 887,378.76 and 498,392.43 is: 686,650.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,087.58 : 887,378.76 = 498,392.43 : x
  2. Step 2: Convert to fraction form
    644,087.58/887,378.76 = 498,392.43/x
  3. Step 3: Cross multiply
    644,087.58x = 887,378.76 × 498,392.43
  4. Step 4: Simplify right side
    644,087.58x = 442,262,856,526.79
  5. Step 5: Solve for x
    x = 442,262,856,526.79/644,087.58
  6. Step 6: Final answer
    x = 686,650.19

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Double scale
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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.