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Finding the Fourth Proportional to 1,325.55, 1,988.26 and 632.69

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Solution

The fourth proportional to 1,325.55, 1,988.26 and 632.69 is: 949.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.55 : 1,988.26 = 632.69 : x
  2. Step 2: Convert to fraction form
    1,325.55/1,988.26 = 632.69/x
  3. Step 3: Cross multiply
    1,325.55x = 1,988.26 × 632.69
  4. Step 4: Simplify right side
    1,325.55x = 1,257,962.90
  5. Step 5: Solve for x
    x = 1,257,962.90/1,325.55
  6. Step 6: Final answer
    x = 949.01

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Half scale
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Double scale
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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.