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Finding the Fourth Proportional to 547,116.87, 755,018.39 and 317,730.55

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Solution

The fourth proportional to 547,116.87, 755,018.39 and 317,730.55 is: 438,466.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,116.87 : 755,018.39 = 317,730.55 : x
  2. Step 2: Convert to fraction form
    547,116.87/755,018.39 = 317,730.55/x
  3. Step 3: Cross multiply
    547,116.87x = 755,018.39 × 317,730.55
  4. Step 4: Simplify right side
    547,116.87x = 239,892,408,314.81
  5. Step 5: Solve for x
    x = 239,892,408,314.81/547,116.87
  6. Step 6: Final answer
    x = 438,466.48

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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.