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Finding the Fourth Proportional to 760.21, 1,140.59 and 370.20

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Solution

The fourth proportional to 760.21, 1,140.59 and 370.20 is: 555.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.21 : 1,140.59 = 370.20 : x
  2. Step 2: Convert to fraction form
    760.21/1,140.59 = 370.20/x
  3. Step 3: Cross multiply
    760.21x = 1,140.59 × 370.20
  4. Step 4: Simplify right side
    760.21x = 422,246.42
  5. Step 5: Solve for x
    x = 422,246.42/760.21
  6. Step 6: Final answer
    x = 555.43

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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.