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Finding the Fourth Proportional to 518,979.70, 778,469.55 and 282,783.70

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Solution

The fourth proportional to 518,979.70, 778,469.55 and 282,783.70 is: 424,175.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,979.70 : 778,469.55 = 282,783.70 : x
  2. Step 2: Convert to fraction form
    518,979.70/778,469.55 = 282,783.70/x
  3. Step 3: Cross multiply
    518,979.70x = 778,469.55 × 282,783.70
  4. Step 4: Simplify right side
    518,979.70x = 220,138,499,686.34
  5. Step 5: Solve for x
    x = 220,138,499,686.34/518,979.70
  6. Step 6: Final answer
    x = 424,175.55

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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.