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Finding the Fourth Proportional to 1,542.01, 2,128.10 and 878.99

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Solution

The fourth proportional to 1,542.01, 2,128.10 and 878.99 is: 1,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.01 : 2,128.10 = 878.99 : x
  2. Step 2: Convert to fraction form
    1,542.01/2,128.10 = 878.99/x
  3. Step 3: Cross multiply
    1,542.01x = 2,128.10 × 878.99
  4. Step 4: Simplify right side
    1,542.01x = 1,870,566.91
  5. Step 5: Solve for x
    x = 1,870,566.91/1,542.01
  6. Step 6: Final answer
    x = 1,213.07

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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.