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Finding the Fourth Proportional to 754.60, 1,040.70 and 607.18

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Solution

The fourth proportional to 754.60, 1,040.70 and 607.18 is: 837.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.60 : 1,040.70 = 607.18 : x
  2. Step 2: Convert to fraction form
    754.60/1,040.70 = 607.18/x
  3. Step 3: Cross multiply
    754.60x = 1,040.70 × 607.18
  4. Step 4: Simplify right side
    754.60x = 631,892.23
  5. Step 5: Solve for x
    x = 631,892.23/754.60
  6. Step 6: Final answer
    x = 837.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.