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Finding the Fourth Proportional to 880.05, 1,215.49 and 584.81

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Solution

The fourth proportional to 880.05, 1,215.49 and 584.81 is: 807.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.05 : 1,215.49 = 584.81 : x
  2. Step 2: Convert to fraction form
    880.05/1,215.49 = 584.81/x
  3. Step 3: Cross multiply
    880.05x = 1,215.49 × 584.81
  4. Step 4: Simplify right side
    880.05x = 710,830.71
  5. Step 5: Solve for x
    x = 710,830.71/880.05
  6. Step 6: Final answer
    x = 807.72

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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.