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Finding the Fourth Proportional to 663,119.76, 915,105.40 and 361,313.76

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Solution

The fourth proportional to 663,119.76, 915,105.40 and 361,313.76 is: 498,613.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,119.76 : 915,105.40 = 361,313.76 : x
  2. Step 2: Convert to fraction form
    663,119.76/915,105.40 = 361,313.76/x
  3. Step 3: Cross multiply
    663,119.76x = 915,105.40 × 361,313.76
  4. Step 4: Simplify right side
    663,119.76x = 330,640,172,870.30
  5. Step 5: Solve for x
    x = 330,640,172,870.30/663,119.76
  6. Step 6: Final answer
    x = 498,613.06

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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.