Home / 1,220.56-1,829.70-490.63

Finding the Fourth Proportional to 1,220.56, 1,829.70 and 490.63

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Solution

The fourth proportional to 1,220.56, 1,829.70 and 490.63 is: 735.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.56 : 1,829.70 = 490.63 : x
  2. Step 2: Convert to fraction form
    1,220.56/1,829.70 = 490.63/x
  3. Step 3: Cross multiply
    1,220.56x = 1,829.70 × 490.63
  4. Step 4: Simplify right side
    1,220.56x = 897,705.71
  5. Step 5: Solve for x
    x = 897,705.71/1,220.56
  6. Step 6: Final answer
    x = 735.49

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Half scale
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Double scale
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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.