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Finding the Fourth Proportional to 553,640.17, 764,026.05 and 311,926.45

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Solution

The fourth proportional to 553,640.17, 764,026.05 and 311,926.45 is: 430,459.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,640.17 : 764,026.05 = 311,926.45 : x
  2. Step 2: Convert to fraction form
    553,640.17/764,026.05 = 311,926.45/x
  3. Step 3: Cross multiply
    553,640.17x = 764,026.05 × 311,926.45
  4. Step 4: Simplify right side
    553,640.17x = 238,319,933,484.02
  5. Step 5: Solve for x
    x = 238,319,933,484.02/553,640.17
  6. Step 6: Final answer
    x = 430,459.97

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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.