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Finding the Fourth Proportional to 989.70, 1,484.55 and 296.30

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Solution

The fourth proportional to 989.70, 1,484.55 and 296.30 is: 444.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.70 : 1,484.55 = 296.30 : x
  2. Step 2: Convert to fraction form
    989.70/1,484.55 = 296.30/x
  3. Step 3: Cross multiply
    989.70x = 1,484.55 × 296.30
  4. Step 4: Simplify right side
    989.70x = 439,875.88
  5. Step 5: Solve for x
    x = 439,875.88/989.70
  6. Step 6: Final answer
    x = 444.45

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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.