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Finding the Fourth Proportional to 845.92, 1,166.40 and 714.72

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Solution

The fourth proportional to 845.92, 1,166.40 and 714.72 is: 985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.92 : 1,166.40 = 714.72 : x
  2. Step 2: Convert to fraction form
    845.92/1,166.40 = 714.72/x
  3. Step 3: Cross multiply
    845.92x = 1,166.40 × 714.72
  4. Step 4: Simplify right side
    845.92x = 833,649.41
  5. Step 5: Solve for x
    x = 833,649.41/845.92
  6. Step 6: Final answer
    x = 985.49

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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.