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Finding the Fourth Proportional to 802.68, 1,202.20 and 559.40

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Solution

The fourth proportional to 802.68, 1,202.20 and 559.40 is: 837.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.68 : 1,202.20 = 559.40 : x
  2. Step 2: Convert to fraction form
    802.68/1,202.20 = 559.40/x
  3. Step 3: Cross multiply
    802.68x = 1,202.20 × 559.40
  4. Step 4: Simplify right side
    802.68x = 672,510.68
  5. Step 5: Solve for x
    x = 672,510.68/802.68
  6. Step 6: Final answer
    x = 837.83

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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.