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Finding the Fourth Proportional to 753.84, 1,040.76 and 607.32

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Solution

The fourth proportional to 753.84, 1,040.76 and 607.32 is: 838.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.84 : 1,040.76 = 607.32 : x
  2. Step 2: Convert to fraction form
    753.84/1,040.76 = 607.32/x
  3. Step 3: Cross multiply
    753.84x = 1,040.76 × 607.32
  4. Step 4: Simplify right side
    753.84x = 632,074.36
  5. Step 5: Solve for x
    x = 632,074.36/753.84
  6. Step 6: Final answer
    x = 838.47

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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.