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Finding the Fourth Proportional to 802.79, 1,203.20 and 456.42

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Solution

The fourth proportional to 802.79, 1,203.20 and 456.42 is: 684.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.79 : 1,203.20 = 456.42 : x
  2. Step 2: Convert to fraction form
    802.79/1,203.20 = 456.42/x
  3. Step 3: Cross multiply
    802.79x = 1,203.20 × 456.42
  4. Step 4: Simplify right side
    802.79x = 549,161.17
  5. Step 5: Solve for x
    x = 549,161.17/802.79
  6. Step 6: Final answer
    x = 684.06

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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.