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Finding the Fourth Proportional to 520,354.79, 780,584.13 and 141,281.62

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Solution

The fourth proportional to 520,354.79, 780,584.13 and 141,281.62 is: 211,936.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,354.79 : 780,584.13 = 141,281.62 : x
  2. Step 2: Convert to fraction form
    520,354.79/780,584.13 = 141,281.62/x
  3. Step 3: Cross multiply
    520,354.79x = 780,584.13 × 141,281.62
  4. Step 4: Simplify right side
    520,354.79x = 110,282,190,432.69
  5. Step 5: Solve for x
    x = 110,282,190,432.69/520,354.79
  6. Step 6: Final answer
    x = 211,936.53

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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.