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Finding the Fourth Proportional to 518,966.40, 778,449.60 and 332,342.40

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Solution

The fourth proportional to 518,966.40, 778,449.60 and 332,342.40 is: 498,513.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,966.40 : 778,449.60 = 332,342.40 : x
  2. Step 2: Convert to fraction form
    518,966.40/778,449.60 = 332,342.40/x
  3. Step 3: Cross multiply
    518,966.40x = 778,449.60 × 332,342.40
  4. Step 4: Simplify right side
    518,966.40x = 258,711,808,343.04
  5. Step 5: Solve for x
    x = 258,711,808,343.04/518,966.40
  6. Step 6: Final answer
    x = 498,513.60

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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.