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Finding the Fourth Proportional to 561,920.40, 842,145.12 and 490,663.44

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Solution

The fourth proportional to 561,920.40, 842,145.12 and 490,663.44 is: 735,352.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,920.40 : 842,145.12 = 490,663.44 : x
  2. Step 2: Convert to fraction form
    561,920.40/842,145.12 = 490,663.44/x
  3. Step 3: Cross multiply
    561,920.40x = 842,145.12 × 490,663.44
  4. Step 4: Simplify right side
    561,920.40x = 413,209,821,558.41
  5. Step 5: Solve for x
    x = 413,209,821,558.41/561,920.40
  6. Step 6: Final answer
    x = 735,352.95

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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.