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Finding the Fourth Proportional to 530.77, 732.81 and 331.90

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Solution

The fourth proportional to 530.77, 732.81 and 331.90 is: 458.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.77 : 732.81 = 331.90 : x
  2. Step 2: Convert to fraction form
    530.77/732.81 = 331.90/x
  3. Step 3: Cross multiply
    530.77x = 732.81 × 331.90
  4. Step 4: Simplify right side
    530.77x = 243,217.65
  5. Step 5: Solve for x
    x = 243,217.65/530.77
  6. Step 6: Final answer
    x = 458.24

Related Problems

Find fourth proportional to 265.38, 366.40 and 165.95
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Double scale
Find fourth proportional to 531.77, 734.19 and 332.90
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.