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Finding the Fourth Proportional to 618.77, 853.70 and 591.81

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Solution

The fourth proportional to 618.77, 853.70 and 591.81 is: 816.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.77 : 853.70 = 591.81 : x
  2. Step 2: Convert to fraction form
    618.77/853.70 = 591.81/x
  3. Step 3: Cross multiply
    618.77x = 853.70 × 591.81
  4. Step 4: Simplify right side
    618.77x = 505,225.24
  5. Step 5: Solve for x
    x = 505,225.24/618.77
  6. Step 6: Final answer
    x = 816.51

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Find fourth proportional to 309.38, 426.85 and 295.91
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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.