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Finding the Fourth Proportional to 611,438.59, 917,351.61 and 476,963.72

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Solution

The fourth proportional to 611,438.59, 917,351.61 and 476,963.72 is: 715,596.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,438.59 : 917,351.61 = 476,963.72 : x
  2. Step 2: Convert to fraction form
    611,438.59/917,351.61 = 476,963.72/x
  3. Step 3: Cross multiply
    611,438.59x = 917,351.61 × 476,963.72
  4. Step 4: Simplify right side
    611,438.59x = 437,543,436,453.59
  5. Step 5: Solve for x
    x = 437,543,436,453.59/611,438.59
  6. Step 6: Final answer
    x = 715,596.70

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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.