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Finding the Fourth Proportional to 1,557.26, 2,148.98 and 885.19

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Solution

The fourth proportional to 1,557.26, 2,148.98 and 885.19 is: 1,221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.26 : 2,148.98 = 885.19 : x
  2. Step 2: Convert to fraction form
    1,557.26/2,148.98 = 885.19/x
  3. Step 3: Cross multiply
    1,557.26x = 2,148.98 × 885.19
  4. Step 4: Simplify right side
    1,557.26x = 1,902,255.61
  5. Step 5: Solve for x
    x = 1,902,255.61/1,557.26
  6. Step 6: Final answer
    x = 1,221.54

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,558.26, 2,150.36 and 886.19
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.