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Finding the Fourth Proportional to 978,451.52, 1,350,246.85 and 570,790.40

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Solution

The fourth proportional to 978,451.52, 1,350,246.85 and 570,790.40 is: 787,681.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,451.52 : 1,350,246.85 = 570,790.40 : x
  2. Step 2: Convert to fraction form
    978,451.52/1,350,246.85 = 570,790.40/x
  3. Step 3: Cross multiply
    978,451.52x = 1,350,246.85 × 570,790.40
  4. Step 4: Simplify right side
    978,451.52x = 770,707,931,432.03
  5. Step 5: Solve for x
    x = 770,707,931,432.03/978,451.52
  6. Step 6: Final answer
    x = 787,681.27

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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.