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Finding the Fourth Proportional to 922,752,012.80, 1,384,128,019.20 and 861,837,939.20

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Solution

The fourth proportional to 922,752,012.80, 1,384,128,019.20 and 861,837,939.20 is: 1,292,756,908.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,752,012.80 : 1,384,128,019.20 = 861,837,939.20 : x
  2. Step 2: Convert to fraction form
    922,752,012.80/1,384,128,019.20 = 861,837,939.20/x
  3. Step 3: Cross multiply
    922,752,012.80x = 1,384,128,019.20 × 861,837,939.20
  4. Step 4: Simplify right side
    922,752,012.80x = 1,192,894,039,656,306,176
  5. Step 5: Solve for x
    x = 1,192,894,039,656,306,176/922,752,012.80
  6. Step 6: Final answer
    x = 1,292,756,908.80

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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.