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Finding the Fourth Proportional to 257,700.20, 385,894.20 and 245,890.40

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Solution

The fourth proportional to 257,700.20, 385,894.20 and 245,890.40 is: 368,209.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,700.20 : 385,894.20 = 245,890.40 : x
  2. Step 2: Convert to fraction form
    257,700.20/385,894.20 = 245,890.40/x
  3. Step 3: Cross multiply
    257,700.20x = 385,894.20 × 245,890.40
  4. Step 4: Simplify right side
    257,700.20x = 94,887,679,195.68
  5. Step 5: Solve for x
    x = 94,887,679,195.68/257,700.20
  6. Step 6: Final answer
    x = 368,209.57

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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.