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Finding the Fourth Proportional to 660,385.92, 990,019.28 and 261,308.24

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Solution

The fourth proportional to 660,385.92, 990,019.28 and 261,308.24 is: 391,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,385.92 : 990,019.28 = 261,308.24 : x
  2. Step 2: Convert to fraction form
    660,385.92/990,019.28 = 261,308.24/x
  3. Step 3: Cross multiply
    660,385.92x = 990,019.28 × 261,308.24
  4. Step 4: Simplify right side
    660,385.92x = 258,700,195,622.87
  5. Step 5: Solve for x
    x = 258,700,195,622.87/660,385.92
  6. Step 6: Final answer
    x = 391,740.93

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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.