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Finding the Fourth Proportional to 553,839.30, 830,285.05 and 212,527.66

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Solution

The fourth proportional to 553,839.30, 830,285.05 and 212,527.66 is: 318,609.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,839.30 : 830,285.05 = 212,527.66 : x
  2. Step 2: Convert to fraction form
    553,839.30/830,285.05 = 212,527.66/x
  3. Step 3: Cross multiply
    553,839.30x = 830,285.05 × 212,527.66
  4. Step 4: Simplify right side
    553,839.30x = 176,458,538,809.48
  5. Step 5: Solve for x
    x = 176,458,538,809.48/553,839.30
  6. Step 6: Final answer
    x = 318,609.64

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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.