Home / 1,127.04-1,690.15-386.50

Finding the Fourth Proportional to 1,127.04, 1,690.15 and 386.50

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Solution

The fourth proportional to 1,127.04, 1,690.15 and 386.50 is: 579.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.04 : 1,690.15 = 386.50 : x
  2. Step 2: Convert to fraction form
    1,127.04/1,690.15 = 386.50/x
  3. Step 3: Cross multiply
    1,127.04x = 1,690.15 × 386.50
  4. Step 4: Simplify right side
    1,127.04x = 653,242.98
  5. Step 5: Solve for x
    x = 653,242.98/1,127.04
  6. Step 6: Final answer
    x = 579.61

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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.