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Finding the Fourth Proportional to 1,127.99, 1,556.57 and 630.53

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Solution

The fourth proportional to 1,127.99, 1,556.57 and 630.53 is: 870.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.99 : 1,556.57 = 630.53 : x
  2. Step 2: Convert to fraction form
    1,127.99/1,556.57 = 630.53/x
  3. Step 3: Cross multiply
    1,127.99x = 1,556.57 × 630.53
  4. Step 4: Simplify right side
    1,127.99x = 981,464.08
  5. Step 5: Solve for x
    x = 981,464.08/1,127.99
  6. Step 6: Final answer
    x = 870.10

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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.