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Finding the Fourth Proportional to 760.92, 1,140.86 and 370.68

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Solution

The fourth proportional to 760.92, 1,140.86 and 370.68 is: 555.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.92 : 1,140.86 = 370.68 : x
  2. Step 2: Convert to fraction form
    760.92/1,140.86 = 370.68/x
  3. Step 3: Cross multiply
    760.92x = 1,140.86 × 370.68
  4. Step 4: Simplify right side
    760.92x = 422,893.98
  5. Step 5: Solve for x
    x = 422,893.98/760.92
  6. Step 6: Final answer
    x = 555.77

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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.