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Finding the Fourth Proportional to 883.74, 1,219.59 and 490.75

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Solution

The fourth proportional to 883.74, 1,219.59 and 490.75 is: 677.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.74 : 1,219.59 = 490.75 : x
  2. Step 2: Convert to fraction form
    883.74/1,219.59 = 490.75/x
  3. Step 3: Cross multiply
    883.74x = 1,219.59 × 490.75
  4. Step 4: Simplify right side
    883.74x = 598,513.79
  5. Step 5: Solve for x
    x = 598,513.79/883.74
  6. Step 6: Final answer
    x = 677.25

Related Problems

Find fourth proportional to 441.87, 609.80 and 245.38
Half scale
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Double scale
Find fourth proportional to 884.74, 1,220.97 and 491.75
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.