Home / 865,258.40-1,298,701.64-439,100.12

Finding the Fourth Proportional to 865,258.40, 1,298,701.64 and 439,100.12

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Solution

The fourth proportional to 865,258.40, 1,298,701.64 and 439,100.12 is: 659,063.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,258.40 : 1,298,701.64 = 439,100.12 : x
  2. Step 2: Convert to fraction form
    865,258.40/1,298,701.64 = 439,100.12/x
  3. Step 3: Cross multiply
    865,258.40x = 1,298,701.64 × 439,100.12
  4. Step 4: Simplify right side
    865,258.40x = 570,260,040,572.44
  5. Step 5: Solve for x
    x = 570,260,040,572.44/865,258.40
  6. Step 6: Final answer
    x = 659,063.29

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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.