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Finding the Fourth Proportional to 666,681.93, 920,023.50 and 360,758.31

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Solution

The fourth proportional to 666,681.93, 920,023.50 and 360,758.31 is: 497,847.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,681.93 : 920,023.50 = 360,758.31 : x
  2. Step 2: Convert to fraction form
    666,681.93/920,023.50 = 360,758.31/x
  3. Step 3: Cross multiply
    666,681.93x = 920,023.50 × 360,758.31
  4. Step 4: Simplify right side
    666,681.93x = 331,906,123,020.29
  5. Step 5: Solve for x
    x = 331,906,123,020.29/666,681.93
  6. Step 6: Final answer
    x = 497,847.79

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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.