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Finding the Fourth Proportional to 283,710.88, 391,521.08 and 156,389.28

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Solution

The fourth proportional to 283,710.88, 391,521.08 and 156,389.28 is: 215,817.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,710.88 : 391,521.08 = 156,389.28 : x
  2. Step 2: Convert to fraction form
    283,710.88/391,521.08 = 156,389.28/x
  3. Step 3: Cross multiply
    283,710.88x = 391,521.08 × 156,389.28
  4. Step 4: Simplify right side
    283,710.88x = 61,229,699,806.02
  5. Step 5: Solve for x
    x = 61,229,699,806.02/283,710.88
  6. Step 6: Final answer
    x = 215,817.24

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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.