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Finding the Fourth Proportional to 637.10, 955.10 and 307.85

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Solution

The fourth proportional to 637.10, 955.10 and 307.85 is: 461.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.10 : 955.10 = 307.85 : x
  2. Step 2: Convert to fraction form
    637.10/955.10 = 307.85/x
  3. Step 3: Cross multiply
    637.10x = 955.10 × 307.85
  4. Step 4: Simplify right side
    637.10x = 294,021.22
  5. Step 5: Solve for x
    x = 294,021.22/637.10
  6. Step 6: Final answer
    x = 461.50

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Double scale
Find fourth proportional to 638.10, 956.59 and 308.85
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.