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Finding the Fourth Proportional to 1,506.72, 2,079.21 and 877.21

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Solution

The fourth proportional to 1,506.72, 2,079.21 and 877.21 is: 1,210.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,506.72 : 2,079.21 = 877.21 : x
  2. Step 2: Convert to fraction form
    1,506.72/2,079.21 = 877.21/x
  3. Step 3: Cross multiply
    1,506.72x = 2,079.21 × 877.21
  4. Step 4: Simplify right side
    1,506.72x = 1,823,903.80
  5. Step 5: Solve for x
    x = 1,823,903.80/1,506.72
  6. Step 6: Final answer
    x = 1,210.51

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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.