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Finding the Fourth Proportional to 385,786.28, 532,402.80 and 216,020.42

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Solution

The fourth proportional to 385,786.28, 532,402.80 and 216,020.42 is: 298,118.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,786.28 : 532,402.80 = 216,020.42 : x
  2. Step 2: Convert to fraction form
    385,786.28/532,402.80 = 216,020.42/x
  3. Step 3: Cross multiply
    385,786.28x = 532,402.80 × 216,020.42
  4. Step 4: Simplify right side
    385,786.28x = 115,009,876,465.18
  5. Step 5: Solve for x
    x = 115,009,876,465.18/385,786.28
  6. Step 6: Final answer
    x = 298,118.11

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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.