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Finding the Fourth Proportional to 265,703.60, 398,633.04 and 85,784.80

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Solution

The fourth proportional to 265,703.60, 398,633.04 and 85,784.80 is: 128,702.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,703.60 : 398,633.04 = 85,784.80 : x
  2. Step 2: Convert to fraction form
    265,703.60/398,633.04 = 85,784.80/x
  3. Step 3: Cross multiply
    265,703.60x = 398,633.04 × 85,784.80
  4. Step 4: Simplify right side
    265,703.60x = 34,196,655,609.79
  5. Step 5: Solve for x
    x = 34,196,655,609.79/265,703.60
  6. Step 6: Final answer
    x = 128,702.27

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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.