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Finding the Fourth Proportional to 898.39, 1,239.36 and 583.63

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Solution

The fourth proportional to 898.39, 1,239.36 and 583.63 is: 805.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.39 : 1,239.36 = 583.63 : x
  2. Step 2: Convert to fraction form
    898.39/1,239.36 = 583.63/x
  3. Step 3: Cross multiply
    898.39x = 1,239.36 × 583.63
  4. Step 4: Simplify right side
    898.39x = 723,327.68
  5. Step 5: Solve for x
    x = 723,327.68/898.39
  6. Step 6: Final answer
    x = 805.14

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Double scale
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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.