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Finding the Fourth Proportional to 265,611.52, 398,495.08 and 85,693.30

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Solution

The fourth proportional to 265,611.52, 398,495.08 and 85,693.30 is: 128,565.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,611.52 : 398,495.08 = 85,693.30 : x
  2. Step 2: Convert to fraction form
    265,611.52/398,495.08 = 85,693.30/x
  3. Step 3: Cross multiply
    265,611.52x = 398,495.08 × 85,693.30
  4. Step 4: Simplify right side
    265,611.52x = 34,148,358,438.96
  5. Step 5: Solve for x
    x = 34,148,358,438.96/265,611.52
  6. Step 6: Final answer
    x = 128,565.05

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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.