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Finding the Fourth Proportional to 630, 939.84 and 607.56

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Solution

The fourth proportional to 630, 939.84 and 607.56 is: 906.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    630 : 939.84 = 607.56 : x
  2. Step 2: Convert to fraction form
    630/939.84 = 607.56/x
  3. Step 3: Cross multiply
    630x = 939.84 × 607.56
  4. Step 4: Simplify right side
    630x = 571,009.19
  5. Step 5: Solve for x
    x = 571,009.19/630
  6. Step 6: Final answer
    x = 906.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.