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Finding the Fourth Proportional to 631.41, 947.04 and 339.50

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Solution

The fourth proportional to 631.41, 947.04 and 339.50 is: 509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.41 : 947.04 = 339.50 : x
  2. Step 2: Convert to fraction form
    631.41/947.04 = 339.50/x
  3. Step 3: Cross multiply
    631.41x = 947.04 × 339.50
  4. Step 4: Simplify right side
    631.41x = 321,514.07
  5. Step 5: Solve for x
    x = 321,514.07/631.41
  6. Step 6: Final answer
    x = 509.20

Related Problems

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Half scale
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Double scale
Find fourth proportional to 632.41, 948.54 and 340.50
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.