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Finding the Fourth Proportional to 530.40, 795.60 and 165.12

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Solution

The fourth proportional to 530.40, 795.60 and 165.12 is: 247.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.40 : 795.60 = 165.12 : x
  2. Step 2: Convert to fraction form
    530.40/795.60 = 165.12/x
  3. Step 3: Cross multiply
    530.40x = 795.60 × 165.12
  4. Step 4: Simplify right side
    530.40x = 131,369.47
  5. Step 5: Solve for x
    x = 131,369.47/530.40
  6. Step 6: Final answer
    x = 247.68

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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.