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Finding the Fourth Proportional to 261,037.20, 391,555.80 and 245,485.20

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Solution

The fourth proportional to 261,037.20, 391,555.80 and 245,485.20 is: 368,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,037.20 : 391,555.80 = 245,485.20 : x
  2. Step 2: Convert to fraction form
    261,037.20/391,555.80 = 245,485.20/x
  3. Step 3: Cross multiply
    261,037.20x = 391,555.80 × 245,485.20
  4. Step 4: Simplify right side
    261,037.20x = 96,121,153,874.16
  5. Step 5: Solve for x
    x = 96,121,153,874.16/261,037.20
  6. Step 6: Final answer
    x = 368,227.80

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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.