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Finding the Fourth Proportional to 553,657.66, 764,028.04 and 311,990.92

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Solution

The fourth proportional to 553,657.66, 764,028.04 and 311,990.92 is: 430,536.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,657.66 : 764,028.04 = 311,990.92 : x
  2. Step 2: Convert to fraction form
    553,657.66/764,028.04 = 311,990.92/x
  3. Step 3: Cross multiply
    553,657.66x = 764,028.04 × 311,990.92
  4. Step 4: Simplify right side
    553,657.66x = 238,369,811,105.40
  5. Step 5: Solve for x
    x = 238,369,811,105.40/553,657.66
  6. Step 6: Final answer
    x = 430,536.46

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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.