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Finding the Fourth Proportional to 393,240, 542,670.56 and 223,474.24

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Solution

The fourth proportional to 393,240, 542,670.56 and 223,474.24 is: 308,394.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,240 : 542,670.56 = 223,474.24 : x
  2. Step 2: Convert to fraction form
    393,240/542,670.56 = 223,474.24/x
  3. Step 3: Cross multiply
    393,240x = 542,670.56 × 223,474.24
  4. Step 4: Simplify right side
    393,240x = 121,272,890,966.37
  5. Step 5: Solve for x
    x = 121,272,890,966.37/393,240
  6. Step 6: Final answer
    x = 308,394.09

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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.