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Finding the Fourth Proportional to 283,710.51, 391,523.19 and 156,390.66

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Solution

The fourth proportional to 283,710.51, 391,523.19 and 156,390.66 is: 215,820.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,710.51 : 391,523.19 = 156,390.66 : x
  2. Step 2: Convert to fraction form
    283,710.51/391,523.19 = 156,390.66/x
  3. Step 3: Cross multiply
    283,710.51x = 391,523.19 × 156,390.66
  4. Step 4: Simplify right side
    283,710.51x = 61,230,570,089.41
  5. Step 5: Solve for x
    x = 61,230,570,089.41/283,710.51
  6. Step 6: Final answer
    x = 215,820.59

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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.