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Finding the Fourth Proportional to 1,037.40, 1,556.70 and 388.59

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Solution

The fourth proportional to 1,037.40, 1,556.70 and 388.59 is: 583.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.40 : 1,556.70 = 388.59 : x
  2. Step 2: Convert to fraction form
    1,037.40/1,556.70 = 388.59/x
  3. Step 3: Cross multiply
    1,037.40x = 1,556.70 × 388.59
  4. Step 4: Simplify right side
    1,037.40x = 604,918.05
  5. Step 5: Solve for x
    x = 604,918.05/1,037.40
  6. Step 6: Final answer
    x = 583.11

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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.