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Finding the Fourth Proportional to 886.42, 1,223.69 and 555.03

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Solution

The fourth proportional to 886.42, 1,223.69 and 555.03 is: 766.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.42 : 1,223.69 = 555.03 : x
  2. Step 2: Convert to fraction form
    886.42/1,223.69 = 555.03/x
  3. Step 3: Cross multiply
    886.42x = 1,223.69 × 555.03
  4. Step 4: Simplify right side
    886.42x = 679,184.66
  5. Step 5: Solve for x
    x = 679,184.66/886.42
  6. Step 6: Final answer
    x = 766.21

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.