Home / 1,323.45-1,987.20-914.40

Finding the Fourth Proportional to 1,323.45, 1,987.20 and 914.40

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Solution

The fourth proportional to 1,323.45, 1,987.20 and 914.40 is: 1,373.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.45 : 1,987.20 = 914.40 : x
  2. Step 2: Convert to fraction form
    1,323.45/1,987.20 = 914.40/x
  3. Step 3: Cross multiply
    1,323.45x = 1,987.20 × 914.40
  4. Step 4: Simplify right side
    1,323.45x = 1,817,095.68
  5. Step 5: Solve for x
    x = 1,817,095.68/1,323.45
  6. Step 6: Final answer
    x = 1,373.00

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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.