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Finding the Fourth Proportional to 989.66, 1,484.08 and 373.26

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Solution

The fourth proportional to 989.66, 1,484.08 and 373.26 is: 559.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.66 : 1,484.08 = 373.26 : x
  2. Step 2: Convert to fraction form
    989.66/1,484.08 = 373.26/x
  3. Step 3: Cross multiply
    989.66x = 1,484.08 × 373.26
  4. Step 4: Simplify right side
    989.66x = 553,947.70
  5. Step 5: Solve for x
    x = 553,947.70/989.66
  6. Step 6: Final answer
    x = 559.74

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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.