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Finding the Fourth Proportional to 530.76, 732.26 and 309.66

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Solution

The fourth proportional to 530.76, 732.26 and 309.66 is: 427.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.76 : 732.26 = 309.66 : x
  2. Step 2: Convert to fraction form
    530.76/732.26 = 309.66/x
  3. Step 3: Cross multiply
    530.76x = 732.26 × 309.66
  4. Step 4: Simplify right side
    530.76x = 226,755.15
  5. Step 5: Solve for x
    x = 226,755.15/530.76
  6. Step 6: Final answer
    x = 427.23

Related Problems

Find fourth proportional to 265.38, 366.13 and 154.83
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.