Home / 1,128.04-1,556.46-630.64

Finding the Fourth Proportional to 1,128.04, 1,556.46 and 630.64

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Solution

The fourth proportional to 1,128.04, 1,556.46 and 630.64 is: 870.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.04 : 1,556.46 = 630.64 : x
  2. Step 2: Convert to fraction form
    1,128.04/1,556.46 = 630.64/x
  3. Step 3: Cross multiply
    1,128.04x = 1,556.46 × 630.64
  4. Step 4: Simplify right side
    1,128.04x = 981,565.93
  5. Step 5: Solve for x
    x = 981,565.93/1,128.04
  6. Step 6: Final answer
    x = 870.15

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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.