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Finding the Fourth Proportional to 760.84, 1,139.10 and 565.48

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Solution

The fourth proportional to 760.84, 1,139.10 and 565.48 is: 846.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.84 : 1,139.10 = 565.48 : x
  2. Step 2: Convert to fraction form
    760.84/1,139.10 = 565.48/x
  3. Step 3: Cross multiply
    760.84x = 1,139.10 × 565.48
  4. Step 4: Simplify right side
    760.84x = 644,138.27
  5. Step 5: Solve for x
    x = 644,138.27/760.84
  6. Step 6: Final answer
    x = 846.61

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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.