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Finding the Fourth Proportional to 1,009.39, 1,393.02 and 567.22

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Solution

The fourth proportional to 1,009.39, 1,393.02 and 567.22 is: 782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.39 : 1,393.02 = 567.22 : x
  2. Step 2: Convert to fraction form
    1,009.39/1,393.02 = 567.22/x
  3. Step 3: Cross multiply
    1,009.39x = 1,393.02 × 567.22
  4. Step 4: Simplify right side
    1,009.39x = 790,148.80
  5. Step 5: Solve for x
    x = 790,148.80/1,009.39
  6. Step 6: Final answer
    x = 782.80

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Double scale
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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.