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Finding the Fourth Proportional to 331,411.80, 497,117.70 and 144,787.80

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Solution

The fourth proportional to 331,411.80, 497,117.70 and 144,787.80 is: 217,181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,411.80 : 497,117.70 = 144,787.80 : x
  2. Step 2: Convert to fraction form
    331,411.80/497,117.70 = 144,787.80/x
  3. Step 3: Cross multiply
    331,411.80x = 497,117.70 × 144,787.80
  4. Step 4: Simplify right side
    331,411.80x = 71,976,578,124.06
  5. Step 5: Solve for x
    x = 71,976,578,124.06/331,411.80
  6. Step 6: Final answer
    x = 217,181.70

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1.5x scale

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.