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Finding the Fourth Proportional to 561,472.36, 842,645.28 and 391,891.01

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Solution

The fourth proportional to 561,472.36, 842,645.28 and 391,891.01 is: 588,141.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,472.36 : 842,645.28 = 391,891.01 : x
  2. Step 2: Convert to fraction form
    561,472.36/842,645.28 = 391,891.01/x
  3. Step 3: Cross multiply
    561,472.36x = 842,645.28 × 391,891.01
  4. Step 4: Simplify right side
    561,472.36x = 330,225,109,642.79
  5. Step 5: Solve for x
    x = 330,225,109,642.79/561,472.36
  6. Step 6: Final answer
    x = 588,141.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.