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Finding the Fourth Proportional to 265,596.48, 398,472.58 and 85,678.30

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Solution

The fourth proportional to 265,596.48, 398,472.58 and 85,678.30 is: 128,542.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,596.48 : 398,472.58 = 85,678.30 : x
  2. Step 2: Convert to fraction form
    265,596.48/398,472.58 = 85,678.30/x
  3. Step 3: Cross multiply
    265,596.48x = 398,472.58 × 85,678.30
  4. Step 4: Simplify right side
    265,596.48x = 34,140,453,251.01
  5. Step 5: Solve for x
    x = 34,140,453,251.01/265,596.48
  6. Step 6: Final answer
    x = 128,542.57

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1.5x scale

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.