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Finding the Fourth Proportional to 802.08, 1,106.55 and 487.35

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Solution

The fourth proportional to 802.08, 1,106.55 and 487.35 is: 672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.08 : 1,106.55 = 487.35 : x
  2. Step 2: Convert to fraction form
    802.08/1,106.55 = 487.35/x
  3. Step 3: Cross multiply
    802.08x = 1,106.55 × 487.35
  4. Step 4: Simplify right side
    802.08x = 539,277.14
  5. Step 5: Solve for x
    x = 539,277.14/802.08
  6. Step 6: Final answer
    x = 672.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.