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Finding the Fourth Proportional to 257,815,642.80, 386,156,593.80 and 223,803,418.80

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Solution

The fourth proportional to 257,815,642.80, 386,156,593.80 and 223,803,418.80 is: 335,213,041.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,815,642.80 : 386,156,593.80 = 223,803,418.80 : x
  2. Step 2: Convert to fraction form
    257,815,642.80/386,156,593.80 = 223,803,418.80/x
  3. Step 3: Cross multiply
    257,815,642.80x = 386,156,593.80 × 223,803,418.80
  4. Step 4: Simplify right side
    257,815,642.80x = 86,423,165,884,602,896
  5. Step 5: Solve for x
    x = 86,423,165,884,602,896/257,815,642.80
  6. Step 6: Final answer
    x = 335,213,041.95

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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.