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Finding the Fourth Proportional to 760.15, 1,049.00 and 428.57

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Solution

The fourth proportional to 760.15, 1,049.00 and 428.57 is: 591.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.15 : 1,049.00 = 428.57 : x
  2. Step 2: Convert to fraction form
    760.15/1,049.00 = 428.57/x
  3. Step 3: Cross multiply
    760.15x = 1,049.00 × 428.57
  4. Step 4: Simplify right side
    760.15x = 449,567.79
  5. Step 5: Solve for x
    x = 449,567.79/760.15
  6. Step 6: Final answer
    x = 591.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.