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Finding the Fourth Proportional to 530.61, 732.25 and 320.79

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Solution

The fourth proportional to 530.61, 732.25 and 320.79 is: 442.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.61 : 732.25 = 320.79 : x
  2. Step 2: Convert to fraction form
    530.61/732.25 = 320.79/x
  3. Step 3: Cross multiply
    530.61x = 732.25 × 320.79
  4. Step 4: Simplify right side
    530.61x = 234,894.82
  5. Step 5: Solve for x
    x = 234,894.82/530.61
  6. Step 6: Final answer
    x = 442.69

Related Problems

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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.