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Finding the Fourth Proportional to 689,805,280.80, 1,034,707,921.20 and 689,805,280.80

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Solution

The fourth proportional to 689,805,280.80, 1,034,707,921.20 and 689,805,280.80 is: 1,034,707,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,805,280.80 : 1,034,707,921.20 = 689,805,280.80 : x
  2. Step 2: Convert to fraction form
    689,805,280.80/1,034,707,921.20 = 689,805,280.80/x
  3. Step 3: Cross multiply
    689,805,280.80x = 1,034,707,921.20 × 689,805,280.80
  4. Step 4: Simplify right side
    689,805,280.80x = 713,746,988,129,350,272
  5. Step 5: Solve for x
    x = 713,746,988,129,350,272/689,805,280.80
  6. Step 6: Final answer
    x = 1,034,707,921.20

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1.5x scale

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.