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Finding the Fourth Proportional to 518,338.76, 777,455.58 and 139,210.24

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Solution

The fourth proportional to 518,338.76, 777,455.58 and 139,210.24 is: 208,801.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,338.76 : 777,455.58 = 139,210.24 : x
  2. Step 2: Convert to fraction form
    518,338.76/777,455.58 = 139,210.24/x
  3. Step 3: Cross multiply
    518,338.76x = 777,455.58 × 139,210.24
  4. Step 4: Simplify right side
    518,338.76x = 108,229,777,881.14
  5. Step 5: Solve for x
    x = 108,229,777,881.14/518,338.76
  6. Step 6: Final answer
    x = 208,801.24

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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.