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Finding the Fourth Proportional to 978,804,912.10, 1,468,207,368.15 and 591,821,385.70

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Solution

The fourth proportional to 978,804,912.10, 1,468,207,368.15 and 591,821,385.70 is: 887,732,078.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,804,912.10 : 1,468,207,368.15 = 591,821,385.70 : x
  2. Step 2: Convert to fraction form
    978,804,912.10/1,468,207,368.15 = 591,821,385.70/x
  3. Step 3: Cross multiply
    978,804,912.10x = 1,468,207,368.15 × 591,821,385.70
  4. Step 4: Simplify right side
    978,804,912.10x = 868,916,519,113,483,136
  5. Step 5: Solve for x
    x = 868,916,519,113,483,136/978,804,912.10
  6. Step 6: Final answer
    x = 887,732,078.55

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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.