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Finding the Fourth Proportional to 518,752.82, 778,063.62 and 139,703.84

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Solution

The fourth proportional to 518,752.82, 778,063.62 and 139,703.84 is: 209,538.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,752.82 : 778,063.62 = 139,703.84 : x
  2. Step 2: Convert to fraction form
    518,752.82/778,063.62 = 139,703.84/x
  3. Step 3: Cross multiply
    518,752.82x = 778,063.62 × 139,703.84
  4. Step 4: Simplify right side
    518,752.82x = 108,698,475,478.30
  5. Step 5: Solve for x
    x = 108,698,475,478.30/518,752.82
  6. Step 6: Final answer
    x = 209,538.09

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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.