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Finding the Fourth Proportional to 553,748.61, 764,188.96 and 312,017.88

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Solution

The fourth proportional to 553,748.61, 764,188.96 and 312,017.88 is: 430,593.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,748.61 : 764,188.96 = 312,017.88 : x
  2. Step 2: Convert to fraction form
    553,748.61/764,188.96 = 312,017.88/x
  3. Step 3: Cross multiply
    553,748.61x = 764,188.96 × 312,017.88
  4. Step 4: Simplify right side
    553,748.61x = 238,440,619,218.61
  5. Step 5: Solve for x
    x = 238,440,619,218.61/553,748.61
  6. Step 6: Final answer
    x = 430,593.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.