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Finding the Fourth Proportional to 393,159.87, 542,557.80 and 223,394.01

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Solution

The fourth proportional to 393,159.87, 542,557.80 and 223,394.01 is: 308,282.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,159.87 : 542,557.80 = 223,394.01 : x
  2. Step 2: Convert to fraction form
    393,159.87/542,557.80 = 223,394.01/x
  3. Step 3: Cross multiply
    393,159.87x = 542,557.80 × 223,394.01
  4. Step 4: Simplify right side
    393,159.87x = 121,204,162,598.78
  5. Step 5: Solve for x
    x = 121,204,162,598.78/393,159.87
  6. Step 6: Final answer
    x = 308,282.13

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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.