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Finding the Fourth Proportional to 518,497.80, 777,746.70 and 442,390.20

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Solution

The fourth proportional to 518,497.80, 777,746.70 and 442,390.20 is: 663,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,497.80 : 777,746.70 = 442,390.20 : x
  2. Step 2: Convert to fraction form
    518,497.80/777,746.70 = 442,390.20/x
  3. Step 3: Cross multiply
    518,497.80x = 777,746.70 × 442,390.20
  4. Step 4: Simplify right side
    518,497.80x = 344,067,518,162.34
  5. Step 5: Solve for x
    x = 344,067,518,162.34/518,497.80
  6. Step 6: Final answer
    x = 663,585.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.