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Finding the Fourth Proportional to 1,055.07, 1,456.11 and 906.20

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Solution

The fourth proportional to 1,055.07, 1,456.11 and 906.20 is: 1,250.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.07 : 1,456.11 = 906.20 : x
  2. Step 2: Convert to fraction form
    1,055.07/1,456.11 = 906.20/x
  3. Step 3: Cross multiply
    1,055.07x = 1,456.11 × 906.20
  4. Step 4: Simplify right side
    1,055.07x = 1,319,516.85
  5. Step 5: Solve for x
    x = 1,319,516.85/1,055.07
  6. Step 6: Final answer
    x = 1,250.64

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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.