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Finding the Fourth Proportional to 387,074.70, 580,612.05 and 165,890.70

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Solution

The fourth proportional to 387,074.70, 580,612.05 and 165,890.70 is: 248,836.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,074.70 : 580,612.05 = 165,890.70 : x
  2. Step 2: Convert to fraction form
    387,074.70/580,612.05 = 165,890.70/x
  3. Step 3: Cross multiply
    387,074.70x = 580,612.05 × 165,890.70
  4. Step 4: Simplify right side
    387,074.70x = 96,318,139,402.94
  5. Step 5: Solve for x
    x = 96,318,139,402.94/387,074.70
  6. Step 6: Final answer
    x = 248,836.05

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Similar ratio
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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.