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Finding the Fourth Proportional to 1,440.80, 2,160.59 and 607.32

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Solution

The fourth proportional to 1,440.80, 2,160.59 and 607.32 is: 910.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.80 : 2,160.59 = 607.32 : x
  2. Step 2: Convert to fraction form
    1,440.80/2,160.59 = 607.32/x
  3. Step 3: Cross multiply
    1,440.80x = 2,160.59 × 607.32
  4. Step 4: Simplify right side
    1,440.80x = 1,312,169.90
  5. Step 5: Solve for x
    x = 1,312,169.90/1,440.80
  6. Step 6: Final answer
    x = 910.72

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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.