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Finding the Fourth Proportional to 282,347.87, 389,640.69 and 155,031.66

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Solution

The fourth proportional to 282,347.87, 389,640.69 and 155,031.66 is: 213,944.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,347.87 : 389,640.69 = 155,031.66 : x
  2. Step 2: Convert to fraction form
    282,347.87/389,640.69 = 155,031.66/x
  3. Step 3: Cross multiply
    282,347.87x = 389,640.69 × 155,031.66
  4. Step 4: Simplify right side
    282,347.87x = 60,406,642,974.25
  5. Step 5: Solve for x
    x = 60,406,642,974.25/282,347.87
  6. Step 6: Final answer
    x = 213,944.04

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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.