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Finding the Fourth Proportional to 283,386.99, 391,069.78 and 156,062.59

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Solution

The fourth proportional to 283,386.99, 391,069.78 and 156,062.59 is: 215,364.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,386.99 : 391,069.78 = 156,062.59 : x
  2. Step 2: Convert to fraction form
    283,386.99/391,069.78 = 156,062.59/x
  3. Step 3: Cross multiply
    283,386.99x = 391,069.78 × 156,062.59
  4. Step 4: Simplify right side
    283,386.99x = 61,031,362,737.53
  5. Step 5: Solve for x
    x = 61,031,362,737.53/283,386.99
  6. Step 6: Final answer
    x = 215,364.02

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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.