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Finding the Fourth Proportional to 880.07, 1,320.03 and 386.96

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Solution

The fourth proportional to 880.07, 1,320.03 and 386.96 is: 580.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.07 : 1,320.03 = 386.96 : x
  2. Step 2: Convert to fraction form
    880.07/1,320.03 = 386.96/x
  3. Step 3: Cross multiply
    880.07x = 1,320.03 × 386.96
  4. Step 4: Simplify right side
    880.07x = 510,792.21
  5. Step 5: Solve for x
    x = 510,792.21/880.07
  6. Step 6: Final answer
    x = 580.40

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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.