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Finding the Fourth Proportional to 988.12, 1,363.38 and 595.24

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Solution

The fourth proportional to 988.12, 1,363.38 and 595.24 is: 821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.12 : 1,363.38 = 595.24 : x
  2. Step 2: Convert to fraction form
    988.12/1,363.38 = 595.24/x
  3. Step 3: Cross multiply
    988.12x = 1,363.38 × 595.24
  4. Step 4: Simplify right side
    988.12x = 811,538.31
  5. Step 5: Solve for x
    x = 811,538.31/988.12
  6. Step 6: Final answer
    x = 821.30

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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.