Home / 388,372,139.12-536,081,275.78-309,132,551.44

Finding the Fourth Proportional to 388,372,139.12, 536,081,275.78 and 309,132,551.44

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Solution

The fourth proportional to 388,372,139.12, 536,081,275.78 and 309,132,551.44 is: 426,704,585.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,372,139.12 : 536,081,275.78 = 309,132,551.44 : x
  2. Step 2: Convert to fraction form
    388,372,139.12/536,081,275.78 = 309,132,551.44/x
  3. Step 3: Cross multiply
    388,372,139.12x = 536,081,275.78 × 309,132,551.44
  4. Step 4: Simplify right side
    388,372,139.12x = 165,720,172,561,081,664
  5. Step 5: Solve for x
    x = 165,720,172,561,081,664/388,372,139.12
  6. Step 6: Final answer
    x = 426,704,585.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.