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Finding the Fourth Proportional to 880.21, 1,319.44 and 417.17

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Solution

The fourth proportional to 880.21, 1,319.44 and 417.17 is: 625.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.21 : 1,319.44 = 417.17 : x
  2. Step 2: Convert to fraction form
    880.21/1,319.44 = 417.17/x
  3. Step 3: Cross multiply
    880.21x = 1,319.44 × 417.17
  4. Step 4: Simplify right side
    880.21x = 550,430.78
  5. Step 5: Solve for x
    x = 550,430.78/880.21
  6. Step 6: Final answer
    x = 625.34

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1.5x scale

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.