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Finding the Fourth Proportional to 611,855.97, 917,689.18 and 312,557.73

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Solution

The fourth proportional to 611,855.97, 917,689.18 and 312,557.73 is: 468,788.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,855.97 : 917,689.18 = 312,557.73 : x
  2. Step 2: Convert to fraction form
    611,855.97/917,689.18 = 312,557.73/x
  3. Step 3: Cross multiply
    611,855.97x = 917,689.18 × 312,557.73
  4. Step 4: Simplify right side
    611,855.97x = 286,830,846,946.36
  5. Step 5: Solve for x
    x = 286,830,846,946.36/611,855.97
  6. Step 6: Final answer
    x = 468,788.18

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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.