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Finding the Fourth Proportional to 716.68, 1,075.42 and 305.77

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Solution

The fourth proportional to 716.68, 1,075.42 and 305.77 is: 458.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.68 : 1,075.42 = 305.77 : x
  2. Step 2: Convert to fraction form
    716.68/1,075.42 = 305.77/x
  3. Step 3: Cross multiply
    716.68x = 1,075.42 × 305.77
  4. Step 4: Simplify right side
    716.68x = 328,831.17
  5. Step 5: Solve for x
    x = 328,831.17/716.68
  6. Step 6: Final answer
    x = 458.83

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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.