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Finding the Fourth Proportional to 385,553.72, 532,065.95 and 215,820.65

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Solution

The fourth proportional to 385,553.72, 532,065.95 and 215,820.65 is: 297,833.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,553.72 : 532,065.95 = 215,820.65 : x
  2. Step 2: Convert to fraction form
    385,553.72/532,065.95 = 215,820.65/x
  3. Step 3: Cross multiply
    385,553.72x = 532,065.95 × 215,820.65
  4. Step 4: Simplify right side
    385,553.72x = 114,830,821,041.58
  5. Step 5: Solve for x
    x = 114,830,821,041.58/385,553.72
  6. Step 6: Final answer
    x = 297,833.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.