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Finding the Fourth Proportional to 554,011.40, 764,489.80 and 312,353.36

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Solution

The fourth proportional to 554,011.40, 764,489.80 and 312,353.36 is: 431,021.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,011.40 : 764,489.80 = 312,353.36 : x
  2. Step 2: Convert to fraction form
    554,011.40/764,489.80 = 312,353.36/x
  3. Step 3: Cross multiply
    554,011.40x = 764,489.80 × 312,353.36
  4. Step 4: Simplify right side
    554,011.40x = 238,790,957,715.73
  5. Step 5: Solve for x
    x = 238,790,957,715.73/554,011.40
  6. Step 6: Final answer
    x = 431,021.74

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1.5x scale

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.