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Finding the Fourth Proportional to 693.45, 1,040.20 and 173.45

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Solution

The fourth proportional to 693.45, 1,040.20 and 173.45 is: 260.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.45 : 1,040.20 = 173.45 : x
  2. Step 2: Convert to fraction form
    693.45/1,040.20 = 173.45/x
  3. Step 3: Cross multiply
    693.45x = 1,040.20 × 173.45
  4. Step 4: Simplify right side
    693.45x = 180,421.82
  5. Step 5: Solve for x
    x = 180,421.82/693.45
  6. Step 6: Final answer
    x = 260.18

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Half scale
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Double scale
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Similar ratio
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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.