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Finding the Fourth Proportional to 880.30, 1,214.61 and 530.98

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Solution

The fourth proportional to 880.30, 1,214.61 and 530.98 is: 732.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.30 : 1,214.61 = 530.98 : x
  2. Step 2: Convert to fraction form
    880.30/1,214.61 = 530.98/x
  3. Step 3: Cross multiply
    880.30x = 1,214.61 × 530.98
  4. Step 4: Simplify right side
    880.30x = 644,933.62
  5. Step 5: Solve for x
    x = 644,933.62/880.30
  6. Step 6: Final answer
    x = 732.63

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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.