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Finding the Fourth Proportional to 522,815.70, 784,223.55 and 518,879.10

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Solution

The fourth proportional to 522,815.70, 784,223.55 and 518,879.10 is: 778,318.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,815.70 : 784,223.55 = 518,879.10 : x
  2. Step 2: Convert to fraction form
    522,815.70/784,223.55 = 518,879.10/x
  3. Step 3: Cross multiply
    522,815.70x = 784,223.55 × 518,879.10
  4. Step 4: Simplify right side
    522,815.70x = 406,917,209,822.81
  5. Step 5: Solve for x
    x = 406,917,209,822.81/522,815.70
  6. Step 6: Final answer
    x = 778,318.65

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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.