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Finding the Fourth Proportional to 530.18, 731.77 and 320.36

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Solution

The fourth proportional to 530.18, 731.77 and 320.36 is: 442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.18 : 731.77 = 320.36 : x
  2. Step 2: Convert to fraction form
    530.18/731.77 = 320.36/x
  3. Step 3: Cross multiply
    530.18x = 731.77 × 320.36
  4. Step 4: Simplify right side
    530.18x = 234,430.60
  5. Step 5: Solve for x
    x = 234,430.60/530.18
  6. Step 6: Final answer
    x = 442.17

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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.