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Finding the Fourth Proportional to 453,074.40, 679,438.80 and 137,426.40

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Solution

The fourth proportional to 453,074.40, 679,438.80 and 137,426.40 is: 206,087.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,074.40 : 679,438.80 = 137,426.40 : x
  2. Step 2: Convert to fraction form
    453,074.40/679,438.80 = 137,426.40/x
  3. Step 3: Cross multiply
    453,074.40x = 679,438.80 × 137,426.40
  4. Step 4: Simplify right side
    453,074.40x = 93,372,828,304.32
  5. Step 5: Solve for x
    x = 93,372,828,304.32/453,074.40
  6. Step 6: Final answer
    x = 206,087.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.