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Finding the Fourth Proportional to 989.14, 1,483.66 and 502.18

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Solution

The fourth proportional to 989.14, 1,483.66 and 502.18 is: 753.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.14 : 1,483.66 = 502.18 : x
  2. Step 2: Convert to fraction form
    989.14/1,483.66 = 502.18/x
  3. Step 3: Cross multiply
    989.14x = 1,483.66 × 502.18
  4. Step 4: Simplify right side
    989.14x = 745,068.09
  5. Step 5: Solve for x
    x = 745,068.09/989.14
  6. Step 6: Final answer
    x = 753.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.