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Finding the Fourth Proportional to 1,010.12, 1,507.46 and 900.77

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Solution

The fourth proportional to 1,010.12, 1,507.46 and 900.77 is: 1,344.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.12 : 1,507.46 = 900.77 : x
  2. Step 2: Convert to fraction form
    1,010.12/1,507.46 = 900.77/x
  3. Step 3: Cross multiply
    1,010.12x = 1,507.46 × 900.77
  4. Step 4: Simplify right side
    1,010.12x = 1,357,862.70
  5. Step 5: Solve for x
    x = 1,357,862.70/1,010.12
  6. Step 6: Final answer
    x = 1,344.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.