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Finding the Fourth Proportional to 386,404.11, 532,621.55 and 304,598.95

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Solution

The fourth proportional to 386,404.11, 532,621.55 and 304,598.95 is: 419,860.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,404.11 : 532,621.55 = 304,598.95 : x
  2. Step 2: Convert to fraction form
    386,404.11/532,621.55 = 304,598.95/x
  3. Step 3: Cross multiply
    386,404.11x = 532,621.55 × 304,598.95
  4. Step 4: Simplify right side
    386,404.11x = 162,235,964,307.32
  5. Step 5: Solve for x
    x = 162,235,964,307.32/386,404.11
  6. Step 6: Final answer
    x = 419,860.87

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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.