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Finding the Fourth Proportional to 753.61, 1,040.57 and 606.93

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Solution

The fourth proportional to 753.61, 1,040.57 and 606.93 is: 838.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.61 : 1,040.57 = 606.93 : x
  2. Step 2: Convert to fraction form
    753.61/1,040.57 = 606.93/x
  3. Step 3: Cross multiply
    753.61x = 1,040.57 × 606.93
  4. Step 4: Simplify right side
    753.61x = 631,552.72
  5. Step 5: Solve for x
    x = 631,552.72/753.61
  6. Step 6: Final answer
    x = 838.04

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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.