Home / 1,127.89-1,556.43-630.60

Finding the Fourth Proportional to 1,127.89, 1,556.43 and 630.60

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Solution

The fourth proportional to 1,127.89, 1,556.43 and 630.60 is: 870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.89 : 1,556.43 = 630.60 : x
  2. Step 2: Convert to fraction form
    1,127.89/1,556.43 = 630.60/x
  3. Step 3: Cross multiply
    1,127.89x = 1,556.43 × 630.60
  4. Step 4: Simplify right side
    1,127.89x = 981,484.76
  5. Step 5: Solve for x
    x = 981,484.76/1,127.89
  6. Step 6: Final answer
    x = 870.20

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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.