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Finding the Fourth Proportional to 761.02, 1,140.46 and 607.42

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Solution

The fourth proportional to 761.02, 1,140.46 and 607.42 is: 910.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.02 : 1,140.46 = 607.42 : x
  2. Step 2: Convert to fraction form
    761.02/1,140.46 = 607.42/x
  3. Step 3: Cross multiply
    761.02x = 1,140.46 × 607.42
  4. Step 4: Simplify right side
    761.02x = 692,738.21
  5. Step 5: Solve for x
    x = 692,738.21/761.02
  6. Step 6: Final answer
    x = 910.28

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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.