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Finding the Fourth Proportional to 1,038.39, 1,556.47 and 517.36

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Solution

The fourth proportional to 1,038.39, 1,556.47 and 517.36 is: 775.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.39 : 1,556.47 = 517.36 : x
  2. Step 2: Convert to fraction form
    1,038.39/1,556.47 = 517.36/x
  3. Step 3: Cross multiply
    1,038.39x = 1,556.47 × 517.36
  4. Step 4: Simplify right side
    1,038.39x = 805,259.73
  5. Step 5: Solve for x
    x = 805,259.73/1,038.39
  6. Step 6: Final answer
    x = 775.49

Related Problems

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Double scale
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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.