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Finding the Fourth Proportional to 667,888.32, 921,780.36 and 413,321.52

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Solution

The fourth proportional to 667,888.32, 921,780.36 and 413,321.52 is: 570,442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,888.32 : 921,780.36 = 413,321.52 : x
  2. Step 2: Convert to fraction form
    667,888.32/921,780.36 = 413,321.52/x
  3. Step 3: Cross multiply
    667,888.32x = 921,780.36 × 413,321.52
  4. Step 4: Simplify right side
    667,888.32x = 380,991,659,501.35
  5. Step 5: Solve for x
    x = 380,991,659,501.35/667,888.32
  6. Step 6: Final answer
    x = 570,442.17

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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.