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Finding the Fourth Proportional to 989.65, 1,483.05 and 555.89

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Solution

The fourth proportional to 989.65, 1,483.05 and 555.89 is: 833.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.65 : 1,483.05 = 555.89 : x
  2. Step 2: Convert to fraction form
    989.65/1,483.05 = 555.89/x
  3. Step 3: Cross multiply
    989.65x = 1,483.05 × 555.89
  4. Step 4: Simplify right side
    989.65x = 824,412.66
  5. Step 5: Solve for x
    x = 824,412.66/989.65
  6. Step 6: Final answer
    x = 833.04

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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.