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Finding the Fourth Proportional to 518,896.20, 778,279.86 and 139,846.58

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Solution

The fourth proportional to 518,896.20, 778,279.86 and 139,846.58 is: 209,752.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,896.20 : 778,279.86 = 139,846.58 : x
  2. Step 2: Convert to fraction form
    518,896.20/778,279.86 = 139,846.58/x
  3. Step 3: Cross multiply
    518,896.20x = 778,279.86 × 139,846.58
  4. Step 4: Simplify right side
    518,896.20x = 108,839,776,703.88
  5. Step 5: Solve for x
    x = 108,839,776,703.88/518,896.20
  6. Step 6: Final answer
    x = 209,752.50

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1.5x scale

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.