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Finding the Fourth Proportional to 900.53, 1,350.20 and 777.13

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Solution

The fourth proportional to 900.53, 1,350.20 and 777.13 is: 1,165.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.53 : 1,350.20 = 777.13 : x
  2. Step 2: Convert to fraction form
    900.53/1,350.20 = 777.13/x
  3. Step 3: Cross multiply
    900.53x = 1,350.20 × 777.13
  4. Step 4: Simplify right side
    900.53x = 1,049,279.49
  5. Step 5: Solve for x
    x = 1,049,279.49/900.53
  6. Step 6: Final answer
    x = 1,165.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.