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Finding the Fourth Proportional to 393,437.94, 542,990.43 and 223,697.58

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Solution

The fourth proportional to 393,437.94, 542,990.43 and 223,697.58 is: 308,728.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,437.94 : 542,990.43 = 223,697.58 : x
  2. Step 2: Convert to fraction form
    393,437.94/542,990.43 = 223,697.58/x
  3. Step 3: Cross multiply
    393,437.94x = 542,990.43 × 223,697.58
  4. Step 4: Simplify right side
    393,437.94x = 121,465,645,154.16
  5. Step 5: Solve for x
    x = 121,465,645,154.16/393,437.94
  6. Step 6: Final answer
    x = 308,728.86

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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.