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Finding the Fourth Proportional to 978,721.60, 1,468,082.40 and 876,078.40

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Solution

The fourth proportional to 978,721.60, 1,468,082.40 and 876,078.40 is: 1,314,117.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,721.60 : 1,468,082.40 = 876,078.40 : x
  2. Step 2: Convert to fraction form
    978,721.60/1,468,082.40 = 876,078.40/x
  3. Step 3: Cross multiply
    978,721.60x = 1,468,082.40 × 876,078.40
  4. Step 4: Simplify right side
    978,721.60x = 1,286,155,280,060.16
  5. Step 5: Solve for x
    x = 1,286,155,280,060.16/978,721.60
  6. Step 6: Final answer
    x = 1,314,117.60

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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.