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Finding the Fourth Proportional to 518,963.70, 778,445.55 and 144,986.10

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Solution

The fourth proportional to 518,963.70, 778,445.55 and 144,986.10 is: 217,479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,963.70 : 778,445.55 = 144,986.10 : x
  2. Step 2: Convert to fraction form
    518,963.70/778,445.55 = 144,986.10/x
  3. Step 3: Cross multiply
    518,963.70x = 778,445.55 × 144,986.10
  4. Step 4: Simplify right side
    518,963.70x = 112,863,784,356.86
  5. Step 5: Solve for x
    x = 112,863,784,356.86/518,963.70
  6. Step 6: Final answer
    x = 217,479.15

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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.