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Finding the Fourth Proportional to 208,215.59, 287,337.60 and 112,722.28

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Solution

The fourth proportional to 208,215.59, 287,337.60 and 112,722.28 is: 155,556.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,215.59 : 287,337.60 = 112,722.28 : x
  2. Step 2: Convert to fraction form
    208,215.59/287,337.60 = 112,722.28/x
  3. Step 3: Cross multiply
    208,215.59x = 287,337.60 × 112,722.28
  4. Step 4: Simplify right side
    208,215.59x = 32,389,348,683.38
  5. Step 5: Solve for x
    x = 32,389,348,683.38/208,215.59
  6. Step 6: Final answer
    x = 155,556.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.