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Finding the Fourth Proportional to 615,114.90, 921,635.55 and 298,890.90

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Solution

The fourth proportional to 615,114.90, 921,635.55 and 298,890.90 is: 447,832.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,114.90 : 921,635.55 = 298,890.90 : x
  2. Step 2: Convert to fraction form
    615,114.90/921,635.55 = 298,890.90/x
  3. Step 3: Cross multiply
    615,114.90x = 921,635.55 × 298,890.90
  4. Step 4: Simplify right side
    615,114.90x = 275,468,479,011.50
  5. Step 5: Solve for x
    x = 275,468,479,011.50/615,114.90
  6. Step 6: Final answer
    x = 447,832.56

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.