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Finding the Fourth Proportional to 518,238, 777,357 and 144,270.72

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Solution

The fourth proportional to 518,238, 777,357 and 144,270.72 is: 216,406.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,238 : 777,357 = 144,270.72 : x
  2. Step 2: Convert to fraction form
    518,238/777,357 = 144,270.72/x
  3. Step 3: Cross multiply
    518,238x = 777,357 × 144,270.72
  4. Step 4: Simplify right side
    518,238x = 112,149,854,087.04
  5. Step 5: Solve for x
    x = 112,149,854,087.04/518,238
  6. Step 6: Final answer
    x = 216,406.08

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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.