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Finding the Fourth Proportional to 328,909.60, 493,364.40 and 141,921.10

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Solution

The fourth proportional to 328,909.60, 493,364.40 and 141,921.10 is: 212,881.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,909.60 : 493,364.40 = 141,921.10 : x
  2. Step 2: Convert to fraction form
    328,909.60/493,364.40 = 141,921.10/x
  3. Step 3: Cross multiply
    328,909.60x = 493,364.40 × 141,921.10
  4. Step 4: Simplify right side
    328,909.60x = 70,018,818,348.84
  5. Step 5: Solve for x
    x = 70,018,818,348.84/328,909.60
  6. Step 6: Final answer
    x = 212,881.65

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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.