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Finding the Fourth Proportional to 956.19, 1,320.44 and 620.67

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Solution

The fourth proportional to 956.19, 1,320.44 and 620.67 is: 857.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.19 : 1,320.44 = 620.67 : x
  2. Step 2: Convert to fraction form
    956.19/1,320.44 = 620.67/x
  3. Step 3: Cross multiply
    956.19x = 1,320.44 × 620.67
  4. Step 4: Simplify right side
    956.19x = 819,557.49
  5. Step 5: Solve for x
    x = 819,557.49/956.19
  6. Step 6: Final answer
    x = 857.11

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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.