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Finding the Fourth Proportional to 760.13, 1,048.97 and 428.58

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Solution

The fourth proportional to 760.13, 1,048.97 and 428.58 is: 591.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.13 : 1,048.97 = 428.58 : x
  2. Step 2: Convert to fraction form
    760.13/1,048.97 = 428.58/x
  3. Step 3: Cross multiply
    760.13x = 1,048.97 × 428.58
  4. Step 4: Simplify right side
    760.13x = 449,565.42
  5. Step 5: Solve for x
    x = 449,565.42/760.13
  6. Step 6: Final answer
    x = 591.44

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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.