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Finding the Fourth Proportional to 548,643.70, 822,965.55 and 478,659.70

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Solution

The fourth proportional to 548,643.70, 822,965.55 and 478,659.70 is: 717,989.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,643.70 : 822,965.55 = 478,659.70 : x
  2. Step 2: Convert to fraction form
    548,643.70/822,965.55 = 478,659.70/x
  3. Step 3: Cross multiply
    548,643.70x = 822,965.55 × 478,659.70
  4. Step 4: Simplify right side
    548,643.70x = 393,920,443,273.34
  5. Step 5: Solve for x
    x = 393,920,443,273.34/548,643.70
  6. Step 6: Final answer
    x = 717,989.55

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Similar ratio
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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.