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Finding the Fourth Proportional to 561,411.15, 842,894.33 and 443,215.95

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Solution

The fourth proportional to 561,411.15, 842,894.33 and 443,215.95 is: 665,437.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,411.15 : 842,894.33 = 443,215.95 : x
  2. Step 2: Convert to fraction form
    561,411.15/842,894.33 = 443,215.95/x
  3. Step 3: Cross multiply
    561,411.15x = 842,894.33 × 443,215.95
  4. Step 4: Simplify right side
    561,411.15x = 373,584,209,004.48
  5. Step 5: Solve for x
    x = 373,584,209,004.48/561,411.15
  6. Step 6: Final answer
    x = 665,437.82

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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.