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Finding the Fourth Proportional to 885.70, 1,329.54 and 561.25

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Solution

The fourth proportional to 885.70, 1,329.54 and 561.25 is: 842.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.70 : 1,329.54 = 561.25 : x
  2. Step 2: Convert to fraction form
    885.70/1,329.54 = 561.25/x
  3. Step 3: Cross multiply
    885.70x = 1,329.54 × 561.25
  4. Step 4: Simplify right side
    885.70x = 746,204.33
  5. Step 5: Solve for x
    x = 746,204.33/885.70
  6. Step 6: Final answer
    x = 842.50

Related Problems

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Half scale
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Double scale
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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.