Home / 287,583.28-431,376-87,902.88

Finding the Fourth Proportional to 287,583.28, 431,376 and 87,902.88

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Solution

The fourth proportional to 287,583.28, 431,376 and 87,902.88 is: 131,854.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,583.28 : 431,376 = 87,902.88 : x
  2. Step 2: Convert to fraction form
    287,583.28/431,376 = 87,902.88/x
  3. Step 3: Cross multiply
    287,583.28x = 431,376 × 87,902.88
  4. Step 4: Simplify right side
    287,583.28x = 37,919,192,762.88
  5. Step 5: Solve for x
    x = 37,919,192,762.88/287,583.28
  6. Step 6: Final answer
    x = 131,854.65

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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.