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Finding the Fourth Proportional to 408,026.80, 612,040.20 and 313,548.40

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Solution

The fourth proportional to 408,026.80, 612,040.20 and 313,548.40 is: 470,322.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,026.80 : 612,040.20 = 313,548.40 : x
  2. Step 2: Convert to fraction form
    408,026.80/612,040.20 = 313,548.40/x
  3. Step 3: Cross multiply
    408,026.80x = 612,040.20 × 313,548.40
  4. Step 4: Simplify right side
    408,026.80x = 191,904,225,445.68
  5. Step 5: Solve for x
    x = 191,904,225,445.68/408,026.80
  6. Step 6: Final answer
    x = 470,322.60

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1.5x scale

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.