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Finding the Fourth Proportional to 355,018.18, 532,784.16 and 138,908.88

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Solution

The fourth proportional to 355,018.18, 532,784.16 and 138,908.88 is: 208,463.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,018.18 : 532,784.16 = 138,908.88 : x
  2. Step 2: Convert to fraction form
    355,018.18/532,784.16 = 138,908.88/x
  3. Step 3: Cross multiply
    355,018.18x = 532,784.16 × 138,908.88
  4. Step 4: Simplify right side
    355,018.18x = 74,008,450,947.34
  5. Step 5: Solve for x
    x = 74,008,450,947.34/355,018.18
  6. Step 6: Final answer
    x = 208,463.83

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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.