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Finding the Fourth Proportional to 845.78, 1,167.22 and 472.76

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Solution

The fourth proportional to 845.78, 1,167.22 and 472.76 is: 652.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.78 : 1,167.22 = 472.76 : x
  2. Step 2: Convert to fraction form
    845.78/1,167.22 = 472.76/x
  3. Step 3: Cross multiply
    845.78x = 1,167.22 × 472.76
  4. Step 4: Simplify right side
    845.78x = 551,814.93
  5. Step 5: Solve for x
    x = 551,814.93/845.78
  6. Step 6: Final answer
    x = 652.43

Related Problems

Find fourth proportional to 422.89, 583.61 and 236.38
Half scale
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Double scale
Find fourth proportional to 846.78, 1,168.60 and 473.76
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.