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Finding the Fourth Proportional to 760.53, 1,048.95 and 574.05

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Solution

The fourth proportional to 760.53, 1,048.95 and 574.05 is: 791.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.53 : 1,048.95 = 574.05 : x
  2. Step 2: Convert to fraction form
    760.53/1,048.95 = 574.05/x
  3. Step 3: Cross multiply
    760.53x = 1,048.95 × 574.05
  4. Step 4: Simplify right side
    760.53x = 602,149.75
  5. Step 5: Solve for x
    x = 602,149.75/760.53
  6. Step 6: Final answer
    x = 791.75

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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.