Home / 1,116.60-1,675.28-423.47

Finding the Fourth Proportional to 1,116.60, 1,675.28 and 423.47

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Solution

The fourth proportional to 1,116.60, 1,675.28 and 423.47 is: 635.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.60 : 1,675.28 = 423.47 : x
  2. Step 2: Convert to fraction form
    1,116.60/1,675.28 = 423.47/x
  3. Step 3: Cross multiply
    1,116.60x = 1,675.28 × 423.47
  4. Step 4: Simplify right side
    1,116.60x = 709,430.82
  5. Step 5: Solve for x
    x = 709,430.82/1,116.60
  6. Step 6: Final answer
    x = 635.35

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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.