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Finding the Fourth Proportional to 518,898.20, 778,282.86 and 139,848.58

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Solution

The fourth proportional to 518,898.20, 778,282.86 and 139,848.58 is: 209,755.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,898.20 : 778,282.86 = 139,848.58 : x
  2. Step 2: Convert to fraction form
    518,898.20/778,282.86 = 139,848.58/x
  3. Step 3: Cross multiply
    518,898.20x = 778,282.86 × 139,848.58
  4. Step 4: Simplify right side
    518,898.20x = 108,841,752,809.34
  5. Step 5: Solve for x
    x = 108,841,752,809.34/518,898.20
  6. Step 6: Final answer
    x = 209,755.50

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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.