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Finding the Fourth Proportional to 978,544.72, 1,350,402.80 and 542,969.92

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Solution

The fourth proportional to 978,544.72, 1,350,402.80 and 542,969.92 is: 749,304.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,544.72 : 1,350,402.80 = 542,969.92 : x
  2. Step 2: Convert to fraction form
    978,544.72/1,350,402.80 = 542,969.92/x
  3. Step 3: Cross multiply
    978,544.72x = 1,350,402.80 × 542,969.92
  4. Step 4: Simplify right side
    978,544.72x = 733,228,100,283.78
  5. Step 5: Solve for x
    x = 733,228,100,283.78/978,544.72
  6. Step 6: Final answer
    x = 749,304.64

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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.