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Finding the Fourth Proportional to 398,981.80, 550,474.95 and 262,966.87

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Solution

The fourth proportional to 398,981.80, 550,474.95 and 262,966.87 is: 362,815.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,981.80 : 550,474.95 = 262,966.87 : x
  2. Step 2: Convert to fraction form
    398,981.80/550,474.95 = 262,966.87/x
  3. Step 3: Cross multiply
    398,981.80x = 550,474.95 × 262,966.87
  4. Step 4: Simplify right side
    398,981.80x = 144,756,674,614.91
  5. Step 5: Solve for x
    x = 144,756,674,614.91/398,981.80
  6. Step 6: Final answer
    x = 362,815.23

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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.