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Finding the Fourth Proportional to 285,230.76, 427,820.46 and 85,595.76

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Solution

The fourth proportional to 285,230.76, 427,820.46 and 85,595.76 is: 128,385.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,230.76 : 427,820.46 = 85,595.76 : x
  2. Step 2: Convert to fraction form
    285,230.76/427,820.46 = 85,595.76/x
  3. Step 3: Cross multiply
    285,230.76x = 427,820.46 × 85,595.76
  4. Step 4: Simplify right side
    285,230.76x = 36,619,617,417.25
  5. Step 5: Solve for x
    x = 36,619,617,417.25/285,230.76
  6. Step 6: Final answer
    x = 128,385.93

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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.