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Finding the Fourth Proportional to 655.51, 904.61 and 356.76

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Solution

The fourth proportional to 655.51, 904.61 and 356.76 is: 492.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.51 : 904.61 = 356.76 : x
  2. Step 2: Convert to fraction form
    655.51/904.61 = 356.76/x
  3. Step 3: Cross multiply
    655.51x = 904.61 × 356.76
  4. Step 4: Simplify right side
    655.51x = 322,728.66
  5. Step 5: Solve for x
    x = 322,728.66/655.51
  6. Step 6: Final answer
    x = 492.33

Related Problems

Find fourth proportional to 327.76, 452.31 and 178.38
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Double scale
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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.