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Finding the Fourth Proportional to 283,651.47, 391,420.35 and 156,326.76

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Solution

The fourth proportional to 283,651.47, 391,420.35 and 156,326.76 is: 215,720.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,651.47 : 391,420.35 = 156,326.76 : x
  2. Step 2: Convert to fraction form
    283,651.47/391,420.35 = 156,326.76/x
  3. Step 3: Cross multiply
    283,651.47x = 391,420.35 × 156,326.76
  4. Step 4: Simplify right side
    283,651.47x = 61,189,475,113.57
  5. Step 5: Solve for x
    x = 61,189,475,113.57/283,651.47
  6. Step 6: Final answer
    x = 215,720.63

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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.