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Finding the Fourth Proportional to 355,013.80, 532,520.70 and 215,045.80

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Solution

The fourth proportional to 355,013.80, 532,520.70 and 215,045.80 is: 322,568.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,013.80 : 532,520.70 = 215,045.80 : x
  2. Step 2: Convert to fraction form
    355,013.80/532,520.70 = 215,045.80/x
  3. Step 3: Cross multiply
    355,013.80x = 532,520.70 × 215,045.80
  4. Step 4: Simplify right side
    355,013.80x = 114,516,339,948.06
  5. Step 5: Solve for x
    x = 114,516,339,948.06/355,013.80
  6. Step 6: Final answer
    x = 322,568.70

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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.