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Finding the Fourth Proportional to 408,478.76, 563,661.20 and 236,362.40

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Solution

The fourth proportional to 408,478.76, 563,661.20 and 236,362.40 is: 326,157.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,478.76 : 563,661.20 = 236,362.40 : x
  2. Step 2: Convert to fraction form
    408,478.76/563,661.20 = 236,362.40/x
  3. Step 3: Cross multiply
    408,478.76x = 563,661.20 × 236,362.40
  4. Step 4: Simplify right side
    408,478.76x = 133,228,314,018.88
  5. Step 5: Solve for x
    x = 133,228,314,018.88/408,478.76
  6. Step 6: Final answer
    x = 326,157.26

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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.