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Finding the Fourth Proportional to 880.20, 1,214.58 and 705.48

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Solution

The fourth proportional to 880.20, 1,214.58 and 705.48 is: 973.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.20 : 1,214.58 = 705.48 : x
  2. Step 2: Convert to fraction form
    880.20/1,214.58 = 705.48/x
  3. Step 3: Cross multiply
    880.20x = 1,214.58 × 705.48
  4. Step 4: Simplify right side
    880.20x = 856,861.90
  5. Step 5: Solve for x
    x = 856,861.90/880.20
  6. Step 6: Final answer
    x = 973.49

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1.5x scale

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.