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Finding the Fourth Proportional to 978,804,912.60, 1,468,207,368.90 and 591,821,386.20

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Solution

The fourth proportional to 978,804,912.60, 1,468,207,368.90 and 591,821,386.20 is: 887,732,079.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,804,912.60 : 1,468,207,368.90 = 591,821,386.20 : x
  2. Step 2: Convert to fraction form
    978,804,912.60/1,468,207,368.90 = 591,821,386.20/x
  3. Step 3: Cross multiply
    978,804,912.60x = 1,468,207,368.90 × 591,821,386.20
  4. Step 4: Simplify right side
    978,804,912.60x = 868,916,520,291,452,928
  5. Step 5: Solve for x
    x = 868,916,520,291,452,928/978,804,912.60
  6. Step 6: Final answer
    x = 887,732,079.30

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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.