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Finding the Fourth Proportional to 611,712.87, 917,578.54 and 212,366.34

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Solution

The fourth proportional to 611,712.87, 917,578.54 and 212,366.34 is: 318,552.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,712.87 : 917,578.54 = 212,366.34 : x
  2. Step 2: Convert to fraction form
    611,712.87/917,578.54 = 212,366.34/x
  3. Step 3: Cross multiply
    611,712.87x = 917,578.54 × 212,366.34
  4. Step 4: Simplify right side
    611,712.87x = 194,862,796,202.34
  5. Step 5: Solve for x
    x = 194,862,796,202.34/611,712.87
  6. Step 6: Final answer
    x = 318,552.72

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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.