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Finding the Fourth Proportional to 989.59, 1,484.52 and 374.08

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Solution

The fourth proportional to 989.59, 1,484.52 and 374.08 is: 561.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.59 : 1,484.52 = 374.08 : x
  2. Step 2: Convert to fraction form
    989.59/1,484.52 = 374.08/x
  3. Step 3: Cross multiply
    989.59x = 1,484.52 × 374.08
  4. Step 4: Simplify right side
    989.59x = 555,329.24
  5. Step 5: Solve for x
    x = 555,329.24/989.59
  6. Step 6: Final answer
    x = 561.17

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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.