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Finding the Fourth Proportional to 478,320, 660,081.60 and 277,232.64

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Solution

The fourth proportional to 478,320, 660,081.60 and 277,232.64 is: 382,581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,320 : 660,081.60 = 277,232.64 : x
  2. Step 2: Convert to fraction form
    478,320/660,081.60 = 277,232.64/x
  3. Step 3: Cross multiply
    478,320x = 660,081.60 × 277,232.64
  4. Step 4: Simplify right side
    478,320x = 182,996,164,583.42
  5. Step 5: Solve for x
    x = 182,996,164,583.42/478,320
  6. Step 6: Final answer
    x = 382,581.04

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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.