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Finding the Fourth Proportional to 530.78, 732.38 and 297.90

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Solution

The fourth proportional to 530.78, 732.38 and 297.90 is: 411.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.78 : 732.38 = 297.90 : x
  2. Step 2: Convert to fraction form
    530.78/732.38 = 297.90/x
  3. Step 3: Cross multiply
    530.78x = 732.38 × 297.90
  4. Step 4: Simplify right side
    530.78x = 218,174.51
  5. Step 5: Solve for x
    x = 218,174.51/530.78
  6. Step 6: Final answer
    x = 411.05

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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.