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Finding the Fourth Proportional to 760.13, 1,138.14 and 394.16

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Solution

The fourth proportional to 760.13, 1,138.14 and 394.16 is: 590.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.13 : 1,138.14 = 394.16 : x
  2. Step 2: Convert to fraction form
    760.13/1,138.14 = 394.16/x
  3. Step 3: Cross multiply
    760.13x = 1,138.14 × 394.16
  4. Step 4: Simplify right side
    760.13x = 448,603.57
  5. Step 5: Solve for x
    x = 448,603.57/760.13
  6. Step 6: Final answer
    x = 590.17

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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.