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Finding the Fourth Proportional to 716.61, 1,075.32 and 306.15

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Solution

The fourth proportional to 716.61, 1,075.32 and 306.15 is: 459.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.61 : 1,075.32 = 306.15 : x
  2. Step 2: Convert to fraction form
    716.61/1,075.32 = 306.15/x
  3. Step 3: Cross multiply
    716.61x = 1,075.32 × 306.15
  4. Step 4: Simplify right side
    716.61x = 329,209.22
  5. Step 5: Solve for x
    x = 329,209.22/716.61
  6. Step 6: Final answer
    x = 459.40

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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.