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Finding the Fourth Proportional to 472,003.40, 708,408.30 and 191,721.80

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Solution

The fourth proportional to 472,003.40, 708,408.30 and 191,721.80 is: 287,746.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,003.40 : 708,408.30 = 191,721.80 : x
  2. Step 2: Convert to fraction form
    472,003.40/708,408.30 = 191,721.80/x
  3. Step 3: Cross multiply
    472,003.40x = 708,408.30 × 191,721.80
  4. Step 4: Simplify right side
    472,003.40x = 135,817,314,410.94
  5. Step 5: Solve for x
    x = 135,817,314,410.94/472,003.40
  6. Step 6: Final answer
    x = 287,746.47

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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.