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Finding the Fourth Proportional to 611,704.95, 917,557.43 and 442,868.55

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Solution

The fourth proportional to 611,704.95, 917,557.43 and 442,868.55 is: 664,302.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,704.95 : 917,557.43 = 442,868.55 : x
  2. Step 2: Convert to fraction form
    611,704.95/917,557.43 = 442,868.55/x
  3. Step 3: Cross multiply
    611,704.95x = 917,557.43 × 442,868.55
  4. Step 4: Simplify right side
    611,704.95x = 406,357,326,351.48
  5. Step 5: Solve for x
    x = 406,357,326,351.48/611,704.95
  6. Step 6: Final answer
    x = 664,302.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.