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Finding the Fourth Proportional to 845.51, 1,266.10 and 708.21

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Solution

The fourth proportional to 845.51, 1,266.10 and 708.21 is: 1,060.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.51 : 1,266.10 = 708.21 : x
  2. Step 2: Convert to fraction form
    845.51/1,266.10 = 708.21/x
  3. Step 3: Cross multiply
    845.51x = 1,266.10 × 708.21
  4. Step 4: Simplify right side
    845.51x = 896,662.91
  5. Step 5: Solve for x
    x = 896,662.91/845.51
  6. Step 6: Final answer
    x = 1,060.51

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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.