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Finding the Fourth Proportional to 631.72, 947.56 and 307

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Solution

The fourth proportional to 631.72, 947.56 and 307 is: 460.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.72 : 947.56 = 307 : x
  2. Step 2: Convert to fraction form
    631.72/947.56 = 307/x
  3. Step 3: Cross multiply
    631.72x = 947.56 × 307
  4. Step 4: Simplify right side
    631.72x = 290,899.39
  5. Step 5: Solve for x
    x = 290,899.39/631.72
  6. Step 6: Final answer
    x = 460.49

Related Problems

Find fourth proportional to 315.86, 473.78 and 153.50
Half scale
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Double scale
Find fourth proportional to 632.72, 949.05 and 308
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.