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Finding the Fourth Proportional to 760.37, 1,139.63 and 348.94

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Solution

The fourth proportional to 760.37, 1,139.63 and 348.94 is: 522.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.37 : 1,139.63 = 348.94 : x
  2. Step 2: Convert to fraction form
    760.37/1,139.63 = 348.94/x
  3. Step 3: Cross multiply
    760.37x = 1,139.63 × 348.94
  4. Step 4: Simplify right side
    760.37x = 397,655.05
  5. Step 5: Solve for x
    x = 397,655.05/760.37
  6. Step 6: Final answer
    x = 522.98

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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.