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Finding the Fourth Proportional to 632.77, 872.78 and 370.78

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Solution

The fourth proportional to 632.77, 872.78 and 370.78 is: 511.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.77 : 872.78 = 370.78 : x
  2. Step 2: Convert to fraction form
    632.77/872.78 = 370.78/x
  3. Step 3: Cross multiply
    632.77x = 872.78 × 370.78
  4. Step 4: Simplify right side
    632.77x = 323,605.33
  5. Step 5: Solve for x
    x = 323,605.33/632.77
  6. Step 6: Final answer
    x = 511.41

Related Problems

Find fourth proportional to 316.38, 436.39 and 185.39
Half scale
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Double scale
Find fourth proportional to 633.77, 874.15 and 371.78
Similar ratio
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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.