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Finding the Fourth Proportional to 690,781.95, 946,374.57 and 664,894.71

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Solution

The fourth proportional to 690,781.95, 946,374.57 and 664,894.71 is: 910,908.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,781.95 : 946,374.57 = 664,894.71 : x
  2. Step 2: Convert to fraction form
    690,781.95/946,374.57 = 664,894.71/x
  3. Step 3: Cross multiply
    690,781.95x = 946,374.57 × 664,894.71
  4. Step 4: Simplify right side
    690,781.95x = 629,239,445,271.53
  5. Step 5: Solve for x
    x = 629,239,445,271.53/690,781.95
  6. Step 6: Final answer
    x = 910,908.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.