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Finding the Fourth Proportional to 904.12, 1,246.54 and 608.76

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Solution

The fourth proportional to 904.12, 1,246.54 and 608.76 is: 839.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.12 : 1,246.54 = 608.76 : x
  2. Step 2: Convert to fraction form
    904.12/1,246.54 = 608.76/x
  3. Step 3: Cross multiply
    904.12x = 1,246.54 × 608.76
  4. Step 4: Simplify right side
    904.12x = 758,843.69
  5. Step 5: Solve for x
    x = 758,843.69/904.12
  6. Step 6: Final answer
    x = 839.32

Related Problems

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Half scale
Find fourth proportional to 1,808.24, 2,493.08 and 1,217.52
Double scale
Find fourth proportional to 905.12, 1,247.92 and 609.76
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.