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Finding the Fourth Proportional to 283,436.72, 391,160.40 and 156,112.28

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Solution

The fourth proportional to 283,436.72, 391,160.40 and 156,112.28 is: 215,444.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,436.72 : 391,160.40 = 156,112.28 : x
  2. Step 2: Convert to fraction form
    283,436.72/391,160.40 = 156,112.28/x
  3. Step 3: Cross multiply
    283,436.72x = 391,160.40 × 156,112.28
  4. Step 4: Simplify right side
    283,436.72x = 61,064,941,889.71
  5. Step 5: Solve for x
    x = 61,064,941,889.71/283,436.72
  6. Step 6: Final answer
    x = 215,444.71

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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.