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Finding the Fourth Proportional to 622.76, 857.32 and 560.12

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Solution

The fourth proportional to 622.76, 857.32 and 560.12 is: 771.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.76 : 857.32 = 560.12 : x
  2. Step 2: Convert to fraction form
    622.76/857.32 = 560.12/x
  3. Step 3: Cross multiply
    622.76x = 857.32 × 560.12
  4. Step 4: Simplify right side
    622.76x = 480,202.08
  5. Step 5: Solve for x
    x = 480,202.08/622.76
  6. Step 6: Final answer
    x = 771.09

Related Problems

Find fourth proportional to 311.38, 428.66 and 280.06
Half scale
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Double scale
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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.