Home / 1,439.71-2,158.19-918.25

Finding the Fourth Proportional to 1,439.71, 2,158.19 and 918.25

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Solution

The fourth proportional to 1,439.71, 2,158.19 and 918.25 is: 1,376.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.71 : 2,158.19 = 918.25 : x
  2. Step 2: Convert to fraction form
    1,439.71/2,158.19 = 918.25/x
  3. Step 3: Cross multiply
    1,439.71x = 2,158.19 × 918.25
  4. Step 4: Simplify right side
    1,439.71x = 1,981,747.18
  5. Step 5: Solve for x
    x = 1,981,747.18/1,439.71
  6. Step 6: Final answer
    x = 1,376.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,440.71, 2,159.69 and 919.25
Similar ratio
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1.5x scale

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.