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Finding the Fourth Proportional to 390,044.20, 538,416.04 and 244,811.20

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Solution

The fourth proportional to 390,044.20, 538,416.04 and 244,811.20 is: 337,936.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,044.20 : 538,416.04 = 244,811.20 : x
  2. Step 2: Convert to fraction form
    390,044.20/538,416.04 = 244,811.20/x
  3. Step 3: Cross multiply
    390,044.20x = 538,416.04 × 244,811.20
  4. Step 4: Simplify right side
    390,044.20x = 131,810,276,851.65
  5. Step 5: Solve for x
    x = 131,810,276,851.65/390,044.20
  6. Step 6: Final answer
    x = 337,936.77

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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.