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Finding the Fourth Proportional to 355,409.70, 532,920.15 and 144,809.70

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Solution

The fourth proportional to 355,409.70, 532,920.15 and 144,809.70 is: 217,135.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,409.70 : 532,920.15 = 144,809.70 : x
  2. Step 2: Convert to fraction form
    355,409.70/532,920.15 = 144,809.70/x
  3. Step 3: Cross multiply
    355,409.70x = 532,920.15 × 144,809.70
  4. Step 4: Simplify right side
    355,409.70x = 77,172,007,045.46
  5. Step 5: Solve for x
    x = 77,172,007,045.46/355,409.70
  6. Step 6: Final answer
    x = 217,135.34

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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.