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Finding the Fourth Proportional to 283,468.87, 391,187.07 and 156,144.47

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Solution

The fourth proportional to 283,468.87, 391,187.07 and 156,144.47 is: 215,479.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,468.87 : 391,187.07 = 156,144.47 : x
  2. Step 2: Convert to fraction form
    283,468.87/391,187.07 = 156,144.47/x
  3. Step 3: Cross multiply
    283,468.87x = 391,187.07 × 156,144.47
  4. Step 4: Simplify right side
    283,468.87x = 61,081,696,159.94
  5. Step 5: Solve for x
    x = 61,081,696,159.94/283,468.87
  6. Step 6: Final answer
    x = 215,479.38

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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.