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Finding the Fourth Proportional to 265,466.43, 398,188.05 and 85,547.85

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Solution

The fourth proportional to 265,466.43, 398,188.05 and 85,547.85 is: 128,318.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,466.43 : 398,188.05 = 85,547.85 : x
  2. Step 2: Convert to fraction form
    265,466.43/398,188.05 = 85,547.85/x
  3. Step 3: Cross multiply
    265,466.43x = 398,188.05 × 85,547.85
  4. Step 4: Simplify right side
    265,466.43x = 34,064,131,573.19
  5. Step 5: Solve for x
    x = 34,064,131,573.19/265,466.43
  6. Step 6: Final answer
    x = 128,318.04

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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.