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Finding the Fourth Proportional to 663,194.72, 915,209.88 and 361,388.72

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Solution

The fourth proportional to 663,194.72, 915,209.88 and 361,388.72 is: 498,717.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,194.72 : 915,209.88 = 361,388.72 : x
  2. Step 2: Convert to fraction form
    663,194.72/915,209.88 = 361,388.72/x
  3. Step 3: Cross multiply
    663,194.72x = 915,209.88 × 361,388.72
  4. Step 4: Simplify right side
    663,194.72x = 330,746,527,064.55
  5. Step 5: Solve for x
    x = 330,746,527,064.55/663,194.72
  6. Step 6: Final answer
    x = 498,717.07

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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.