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Finding the Fourth Proportional to 385,819.12, 532,415.46 and 216,044.56

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Solution

The fourth proportional to 385,819.12, 532,415.46 and 216,044.56 is: 298,133.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,819.12 : 532,415.46 = 216,044.56 : x
  2. Step 2: Convert to fraction form
    385,819.12/532,415.46 = 216,044.56/x
  3. Step 3: Cross multiply
    385,819.12x = 532,415.46 × 216,044.56
  4. Step 4: Simplify right side
    385,819.12x = 115,025,463,792.90
  5. Step 5: Solve for x
    x = 115,025,463,792.90/385,819.12
  6. Step 6: Final answer
    x = 298,133.14

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1.5x scale

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.