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Finding the Fourth Proportional to 667,809.18, 921,574.50 and 361,886.76

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Solution

The fourth proportional to 667,809.18, 921,574.50 and 361,886.76 is: 499,402.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,809.18 : 921,574.50 = 361,886.76 : x
  2. Step 2: Convert to fraction form
    667,809.18/921,574.50 = 361,886.76/x
  3. Step 3: Cross multiply
    667,809.18x = 921,574.50 × 361,886.76
  4. Step 4: Simplify right side
    667,809.18x = 333,505,609,903.62
  5. Step 5: Solve for x
    x = 333,505,609,903.62/667,809.18
  6. Step 6: Final answer
    x = 499,402.55

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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.