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Finding the Fourth Proportional to 553,656.66, 764,026.66 and 311,989.92

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Solution

The fourth proportional to 553,656.66, 764,026.66 and 311,989.92 is: 430,535.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,656.66 : 764,026.66 = 311,989.92 : x
  2. Step 2: Convert to fraction form
    553,656.66/764,026.66 = 311,989.92/x
  3. Step 3: Cross multiply
    553,656.66x = 764,026.66 × 311,989.92
  4. Step 4: Simplify right side
    553,656.66x = 238,368,616,531.27
  5. Step 5: Solve for x
    x = 238,368,616,531.27/553,656.66
  6. Step 6: Final answer
    x = 430,535.08

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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.