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Finding the Fourth Proportional to 399,278.80, 598,918.20 and 370,410.40

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Solution

The fourth proportional to 399,278.80, 598,918.20 and 370,410.40 is: 555,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,278.80 : 598,918.20 = 370,410.40 : x
  2. Step 2: Convert to fraction form
    399,278.80/598,918.20 = 370,410.40/x
  3. Step 3: Cross multiply
    399,278.80x = 598,918.20 × 370,410.40
  4. Step 4: Simplify right side
    399,278.80x = 221,845,530,029.28
  5. Step 5: Solve for x
    x = 221,845,530,029.28/399,278.80
  6. Step 6: Final answer
    x = 555,615.60

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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.