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Finding the Fourth Proportional to 874,906,643.20, 1,312,359,964.80 and 861,301,753.60

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Solution

The fourth proportional to 874,906,643.20, 1,312,359,964.80 and 861,301,753.60 is: 1,291,952,630.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,906,643.20 : 1,312,359,964.80 = 861,301,753.60 : x
  2. Step 2: Convert to fraction form
    874,906,643.20/1,312,359,964.80 = 861,301,753.60/x
  3. Step 3: Cross multiply
    874,906,643.20x = 1,312,359,964.80 × 861,301,753.60
  4. Step 4: Simplify right side
    874,906,643.20x = 1,130,337,939,036,674,304
  5. Step 5: Solve for x
    x = 1,130,337,939,036,674,304/874,906,643.20
  6. Step 6: Final answer
    x = 1,291,952,630.40

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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.