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Finding the Fourth Proportional to 287,598.98, 397,604.05 and 215,854.45

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Solution

The fourth proportional to 287,598.98, 397,604.05 and 215,854.45 is: 298,417.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,598.98 : 397,604.05 = 215,854.45 : x
  2. Step 2: Convert to fraction form
    287,598.98/397,604.05 = 215,854.45/x
  3. Step 3: Cross multiply
    287,598.98x = 397,604.05 × 215,854.45
  4. Step 4: Simplify right side
    287,598.98x = 85,824,601,996.88
  5. Step 5: Solve for x
    x = 85,824,601,996.88/287,598.98
  6. Step 6: Final answer
    x = 298,417.61

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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.