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Finding the Fourth Proportional to 667,618.76, 921,314.10 and 361,697.25

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Solution

The fourth proportional to 667,618.76, 921,314.10 and 361,697.25 is: 499,142.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,618.76 : 921,314.10 = 361,697.25 : x
  2. Step 2: Convert to fraction form
    667,618.76/921,314.10 = 361,697.25/x
  3. Step 3: Cross multiply
    667,618.76x = 921,314.10 × 361,697.25
  4. Step 4: Simplify right side
    667,618.76x = 333,236,776,356.23
  5. Step 5: Solve for x
    x = 333,236,776,356.23/667,618.76
  6. Step 6: Final answer
    x = 499,142.32

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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.