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Finding the Fourth Proportional to 478,781.46, 660,713.94 and 260,990.10

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Solution

The fourth proportional to 478,781.46, 660,713.94 and 260,990.10 is: 360,163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,781.46 : 660,713.94 = 260,990.10 : x
  2. Step 2: Convert to fraction form
    478,781.46/660,713.94 = 260,990.10/x
  3. Step 3: Cross multiply
    478,781.46x = 660,713.94 × 260,990.10
  4. Step 4: Simplify right side
    478,781.46x = 172,439,797,271.99
  5. Step 5: Solve for x
    x = 172,439,797,271.99/478,781.46
  6. Step 6: Final answer
    x = 360,163.90

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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.