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Finding the Fourth Proportional to 287,015.40, 396,627.44 and 215,270.87

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Solution

The fourth proportional to 287,015.40, 396,627.44 and 215,270.87 is: 297,483.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,015.40 : 396,627.44 = 215,270.87 : x
  2. Step 2: Convert to fraction form
    287,015.40/396,627.44 = 215,270.87/x
  3. Step 3: Cross multiply
    287,015.40x = 396,627.44 × 215,270.87
  4. Step 4: Simplify right side
    287,015.40x = 85,382,331,015.18
  5. Step 5: Solve for x
    x = 85,382,331,015.18/287,015.40
  6. Step 6: Final answer
    x = 297,483.45

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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.