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Finding the Fourth Proportional to 760.34, 1,140.06 and 343.70

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Solution

The fourth proportional to 760.34, 1,140.06 and 343.70 is: 515.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.34 : 1,140.06 = 343.70 : x
  2. Step 2: Convert to fraction form
    760.34/1,140.06 = 343.70/x
  3. Step 3: Cross multiply
    760.34x = 1,140.06 × 343.70
  4. Step 4: Simplify right side
    760.34x = 391,838.62
  5. Step 5: Solve for x
    x = 391,838.62/760.34
  6. Step 6: Final answer
    x = 515.35

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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.