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Finding the Fourth Proportional to 663,903.92, 913,972.66 and 633,400.40

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Solution

The fourth proportional to 663,903.92, 913,972.66 and 633,400.40 is: 871,979.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,903.92 : 913,972.66 = 633,400.40 : x
  2. Step 2: Convert to fraction form
    663,903.92/913,972.66 = 633,400.40/x
  3. Step 3: Cross multiply
    663,903.92x = 913,972.66 × 633,400.40
  4. Step 4: Simplify right side
    663,903.92x = 578,910,648,433.06
  5. Step 5: Solve for x
    x = 578,910,648,433.06/663,903.92
  6. Step 6: Final answer
    x = 871,979.56

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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.