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Finding the Fourth Proportional to 245,387.40, 368,081.10 and 145,854.60

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Solution

The fourth proportional to 245,387.40, 368,081.10 and 145,854.60 is: 218,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,387.40 : 368,081.10 = 145,854.60 : x
  2. Step 2: Convert to fraction form
    245,387.40/368,081.10 = 145,854.60/x
  3. Step 3: Cross multiply
    245,387.40x = 368,081.10 × 145,854.60
  4. Step 4: Simplify right side
    245,387.40x = 53,686,321,608.06
  5. Step 5: Solve for x
    x = 53,686,321,608.06/245,387.40
  6. Step 6: Final answer
    x = 218,781.90

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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.