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Finding the Fourth Proportional to 886,685.86, 1,330,215.85 and 287,600.50

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Solution

The fourth proportional to 886,685.86, 1,330,215.85 and 287,600.50 is: 431,461.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,685.86 : 1,330,215.85 = 287,600.50 : x
  2. Step 2: Convert to fraction form
    886,685.86/1,330,215.85 = 287,600.50/x
  3. Step 3: Cross multiply
    886,685.86x = 1,330,215.85 × 287,600.50
  4. Step 4: Simplify right side
    886,685.86x = 382,570,736,916.85
  5. Step 5: Solve for x
    x = 382,570,736,916.85/886,685.86
  6. Step 6: Final answer
    x = 431,461.42

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Double scale
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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.