Home / 1,020.72-1,531.65-371.58

Finding the Fourth Proportional to 1,020.72, 1,531.65 and 371.58

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Solution

The fourth proportional to 1,020.72, 1,531.65 and 371.58 is: 557.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.72 : 1,531.65 = 371.58 : x
  2. Step 2: Convert to fraction form
    1,020.72/1,531.65 = 371.58/x
  3. Step 3: Cross multiply
    1,020.72x = 1,531.65 × 371.58
  4. Step 4: Simplify right side
    1,020.72x = 569,130.51
  5. Step 5: Solve for x
    x = 569,130.51/1,020.72
  6. Step 6: Final answer
    x = 557.58

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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.