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Finding the Fourth Proportional to 900.11, 1,355.47 and 875.48

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Solution

The fourth proportional to 900.11, 1,355.47 and 875.48 is: 1,318.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.11 : 1,355.47 = 875.48 : x
  2. Step 2: Convert to fraction form
    900.11/1,355.47 = 875.48/x
  3. Step 3: Cross multiply
    900.11x = 1,355.47 × 875.48
  4. Step 4: Simplify right side
    900.11x = 1,186,677.91
  5. Step 5: Solve for x
    x = 1,186,677.91/900.11
  6. Step 6: Final answer
    x = 1,318.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.