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Finding the Fourth Proportional to 663,291.20, 915,338.40 and 361,482.56

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Solution

The fourth proportional to 663,291.20, 915,338.40 and 361,482.56 is: 498,844.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,291.20 : 915,338.40 = 361,482.56 : x
  2. Step 2: Convert to fraction form
    663,291.20/915,338.40 = 361,482.56/x
  3. Step 3: Cross multiply
    663,291.20x = 915,338.40 × 361,482.56
  4. Step 4: Simplify right side
    663,291.20x = 330,878,868,098.30
  5. Step 5: Solve for x
    x = 330,878,868,098.30/663,291.20
  6. Step 6: Final answer
    x = 498,844.05

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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.