Home / 1,475.49-2,212.15-890.70

Finding the Fourth Proportional to 1,475.49, 2,212.15 and 890.70

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Solution

The fourth proportional to 1,475.49, 2,212.15 and 890.70 is: 1,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.49 : 2,212.15 = 890.70 : x
  2. Step 2: Convert to fraction form
    1,475.49/2,212.15 = 890.70/x
  3. Step 3: Cross multiply
    1,475.49x = 2,212.15 × 890.70
  4. Step 4: Simplify right side
    1,475.49x = 1,970,362.01
  5. Step 5: Solve for x
    x = 1,970,362.01/1,475.49
  6. Step 6: Final answer
    x = 1,335.40

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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.