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Finding the Fourth Proportional to 399,335.28, 551,083.88 and 218,048.80

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Solution

The fourth proportional to 399,335.28, 551,083.88 and 218,048.80 is: 300,908.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,335.28 : 551,083.88 = 218,048.80 : x
  2. Step 2: Convert to fraction form
    399,335.28/551,083.88 = 218,048.80/x
  3. Step 3: Cross multiply
    399,335.28x = 551,083.88 × 218,048.80
  4. Step 4: Simplify right side
    399,335.28x = 120,163,178,733.34
  5. Step 5: Solve for x
    x = 120,163,178,733.34/399,335.28
  6. Step 6: Final answer
    x = 300,908.00

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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.