Home / 1,128.24-1,556.98-630.87

Finding the Fourth Proportional to 1,128.24, 1,556.98 and 630.87

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Solution

The fourth proportional to 1,128.24, 1,556.98 and 630.87 is: 870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.24 : 1,556.98 = 630.87 : x
  2. Step 2: Convert to fraction form
    1,128.24/1,556.98 = 630.87/x
  3. Step 3: Cross multiply
    1,128.24x = 1,556.98 × 630.87
  4. Step 4: Simplify right side
    1,128.24x = 982,248.82
  5. Step 5: Solve for x
    x = 982,248.82/1,128.24
  6. Step 6: Final answer
    x = 870.60

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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.