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Finding the Fourth Proportional to 760.66, 1,140.99 and 395.35

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Solution

The fourth proportional to 760.66, 1,140.99 and 395.35 is: 593.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.66 : 1,140.99 = 395.35 : x
  2. Step 2: Convert to fraction form
    760.66/1,140.99 = 395.35/x
  3. Step 3: Cross multiply
    760.66x = 1,140.99 × 395.35
  4. Step 4: Simplify right side
    760.66x = 451,090.40
  5. Step 5: Solve for x
    x = 451,090.40/760.66
  6. Step 6: Final answer
    x = 593.03

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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.