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Finding the Fourth Proportional to 613,815.98, 847,108.62 and 372,108.74

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Solution

The fourth proportional to 613,815.98, 847,108.62 and 372,108.74 is: 513,535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,815.98 : 847,108.62 = 372,108.74 : x
  2. Step 2: Convert to fraction form
    613,815.98/847,108.62 = 372,108.74/x
  3. Step 3: Cross multiply
    613,815.98x = 847,108.62 × 372,108.74
  4. Step 4: Simplify right side
    613,815.98x = 315,216,516,995.80
  5. Step 5: Solve for x
    x = 315,216,516,995.80/613,815.98
  6. Step 6: Final answer
    x = 513,535.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.