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Finding the Fourth Proportional to 408,643.70, 613,426.35 and 315,562.10

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Solution

The fourth proportional to 408,643.70, 613,426.35 and 315,562.10 is: 473,698.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,643.70 : 613,426.35 = 315,562.10 : x
  2. Step 2: Convert to fraction form
    408,643.70/613,426.35 = 315,562.10/x
  3. Step 3: Cross multiply
    408,643.70x = 613,426.35 × 315,562.10
  4. Step 4: Simplify right side
    408,643.70x = 193,574,107,201.34
  5. Step 5: Solve for x
    x = 193,574,107,201.34/408,643.70
  6. Step 6: Final answer
    x = 473,698.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.