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Finding the Fourth Proportional to 760.69, 1,140.21 and 496.82

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Solution

The fourth proportional to 760.69, 1,140.21 and 496.82 is: 744.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.69 : 1,140.21 = 496.82 : x
  2. Step 2: Convert to fraction form
    760.69/1,140.21 = 496.82/x
  3. Step 3: Cross multiply
    760.69x = 1,140.21 × 496.82
  4. Step 4: Simplify right side
    760.69x = 566,482.43
  5. Step 5: Solve for x
    x = 566,482.43/760.69
  6. Step 6: Final answer
    x = 744.69

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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.