Home / 287,621.72-397,635.37-215,877.18

Finding the Fourth Proportional to 287,621.72, 397,635.37 and 215,877.18

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Solution

The fourth proportional to 287,621.72, 397,635.37 and 215,877.18 is: 298,448.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,621.72 : 397,635.37 = 215,877.18 : x
  2. Step 2: Convert to fraction form
    287,621.72/397,635.37 = 215,877.18/x
  3. Step 3: Cross multiply
    287,621.72x = 397,635.37 × 215,877.18
  4. Step 4: Simplify right side
    287,621.72x = 85,840,401,804.16
  5. Step 5: Solve for x
    x = 85,840,401,804.16/287,621.72
  6. Step 6: Final answer
    x = 298,448.96

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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.