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Finding the Fourth Proportional to 782,875.92, 1,080,372.88 and 438,712.64

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Solution

The fourth proportional to 782,875.92, 1,080,372.88 and 438,712.64 is: 605,425.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,875.92 : 1,080,372.88 = 438,712.64 : x
  2. Step 2: Convert to fraction form
    782,875.92/1,080,372.88 = 438,712.64/x
  3. Step 3: Cross multiply
    782,875.92x = 1,080,372.88 × 438,712.64
  4. Step 4: Simplify right side
    782,875.92x = 473,973,238,369.20
  5. Step 5: Solve for x
    x = 473,973,238,369.20/782,875.92
  6. Step 6: Final answer
    x = 605,425.75

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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.