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Finding the Fourth Proportional to 561,324.38, 774,638.79 and 306,691.34

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Solution

The fourth proportional to 561,324.38, 774,638.79 and 306,691.34 is: 423,240.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,324.38 : 774,638.79 = 306,691.34 : x
  2. Step 2: Convert to fraction form
    561,324.38/774,638.79 = 306,691.34/x
  3. Step 3: Cross multiply
    561,324.38x = 774,638.79 × 306,691.34
  4. Step 4: Simplify right side
    561,324.38x = 237,575,008,521.08
  5. Step 5: Solve for x
    x = 237,575,008,521.08/561,324.38
  6. Step 6: Final answer
    x = 423,240.14

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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.