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Finding the Fourth Proportional to 920.40, 1,270.08 and 527.34

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Solution

The fourth proportional to 920.40, 1,270.08 and 527.34 is: 727.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.40 : 1,270.08 = 527.34 : x
  2. Step 2: Convert to fraction form
    920.40/1,270.08 = 527.34/x
  3. Step 3: Cross multiply
    920.40x = 1,270.08 × 527.34
  4. Step 4: Simplify right side
    920.40x = 669,768.75
  5. Step 5: Solve for x
    x = 669,768.75/920.40
  6. Step 6: Final answer
    x = 727.70

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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.