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Finding the Fourth Proportional to 956.40, 1,320.01 and 558.11

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Solution

The fourth proportional to 956.40, 1,320.01 and 558.11 is: 770.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.40 : 1,320.01 = 558.11 : x
  2. Step 2: Convert to fraction form
    956.40/1,320.01 = 558.11/x
  3. Step 3: Cross multiply
    956.40x = 1,320.01 × 558.11
  4. Step 4: Simplify right side
    956.40x = 736,705.58
  5. Step 5: Solve for x
    x = 736,705.58/956.40
  6. Step 6: Final answer
    x = 770.29

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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.