Home / 1,130.04-1,695.15-480.78

Finding the Fourth Proportional to 1,130.04, 1,695.15 and 480.78

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Solution

The fourth proportional to 1,130.04, 1,695.15 and 480.78 is: 721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.04 : 1,695.15 = 480.78 : x
  2. Step 2: Convert to fraction form
    1,130.04/1,695.15 = 480.78/x
  3. Step 3: Cross multiply
    1,130.04x = 1,695.15 × 480.78
  4. Step 4: Simplify right side
    1,130.04x = 814,994.22
  5. Step 5: Solve for x
    x = 814,994.22/1,130.04
  6. Step 6: Final answer
    x = 721.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.