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Finding the Fourth Proportional to 988.40, 1,481.99 and 525.89

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Solution

The fourth proportional to 988.40, 1,481.99 and 525.89 is: 788.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.40 : 1,481.99 = 525.89 : x
  2. Step 2: Convert to fraction form
    988.40/1,481.99 = 525.89/x
  3. Step 3: Cross multiply
    988.40x = 1,481.99 × 525.89
  4. Step 4: Simplify right side
    988.40x = 779,364.80
  5. Step 5: Solve for x
    x = 779,364.80/988.40
  6. Step 6: Final answer
    x = 788.51

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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.