Home / 1,127.40-1,555.80-630.04

Finding the Fourth Proportional to 1,127.40, 1,555.80 and 630.04

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Solution

The fourth proportional to 1,127.40, 1,555.80 and 630.04 is: 869.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.40 : 1,555.80 = 630.04 : x
  2. Step 2: Convert to fraction form
    1,127.40/1,555.80 = 630.04/x
  3. Step 3: Cross multiply
    1,127.40x = 1,555.80 × 630.04
  4. Step 4: Simplify right side
    1,127.40x = 980,216.23
  5. Step 5: Solve for x
    x = 980,216.23/1,127.40
  6. Step 6: Final answer
    x = 869.45

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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.