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Finding the Fourth Proportional to 690,876, 1,035,868.68 and 291,409.92

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Solution

The fourth proportional to 690,876, 1,035,868.68 and 291,409.92 is: 436,927.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,876 : 1,035,868.68 = 291,409.92 : x
  2. Step 2: Convert to fraction form
    690,876/1,035,868.68 = 291,409.92/x
  3. Step 3: Cross multiply
    690,876x = 1,035,868.68 × 291,409.92
  4. Step 4: Simplify right side
    690,876x = 301,862,409,169.31
  5. Step 5: Solve for x
    x = 301,862,409,169.31/690,876
  6. Step 6: Final answer
    x = 436,927.05

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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.