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Finding the Fourth Proportional to 554,279.64, 764,895.16 and 312,557.80

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Solution

The fourth proportional to 554,279.64, 764,895.16 and 312,557.80 is: 431,323.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,279.64 : 764,895.16 = 312,557.80 : x
  2. Step 2: Convert to fraction form
    554,279.64/764,895.16 = 312,557.80/x
  3. Step 3: Cross multiply
    554,279.64x = 764,895.16 × 312,557.80
  4. Step 4: Simplify right side
    554,279.64x = 239,073,948,440.25
  5. Step 5: Solve for x
    x = 239,073,948,440.25/554,279.64
  6. Step 6: Final answer
    x = 431,323.71

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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.