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Finding the Fourth Proportional to 282,874.70, 390,350.79 and 155,550.39

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Solution

The fourth proportional to 282,874.70, 390,350.79 and 155,550.39 is: 214,650.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,874.70 : 390,350.79 = 155,550.39 : x
  2. Step 2: Convert to fraction form
    282,874.70/390,350.79 = 155,550.39/x
  3. Step 3: Cross multiply
    282,874.70x = 390,350.79 × 155,550.39
  4. Step 4: Simplify right side
    282,874.70x = 60,719,217,621.31
  5. Step 5: Solve for x
    x = 60,719,217,621.31/282,874.70
  6. Step 6: Final answer
    x = 214,650.58

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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.