Home / 1,084.19-1,626.10-390.72

Finding the Fourth Proportional to 1,084.19, 1,626.10 and 390.72

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Solution

The fourth proportional to 1,084.19, 1,626.10 and 390.72 is: 586.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.19 : 1,626.10 = 390.72 : x
  2. Step 2: Convert to fraction form
    1,084.19/1,626.10 = 390.72/x
  3. Step 3: Cross multiply
    1,084.19x = 1,626.10 × 390.72
  4. Step 4: Simplify right side
    1,084.19x = 635,349.79
  5. Step 5: Solve for x
    x = 635,349.79/1,084.19
  6. Step 6: Final answer
    x = 586.01

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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.