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Finding the Fourth Proportional to 398,840.80, 596,803.20 and 293,864.80

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Solution

The fourth proportional to 398,840.80, 596,803.20 and 293,864.80 is: 439,722.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,840.80 : 596,803.20 = 293,864.80 : x
  2. Step 2: Convert to fraction form
    398,840.80/596,803.20 = 293,864.80/x
  3. Step 3: Cross multiply
    398,840.80x = 596,803.20 × 293,864.80
  4. Step 4: Simplify right side
    398,840.80x = 175,379,453,007.36
  5. Step 5: Solve for x
    x = 175,379,453,007.36/398,840.80
  6. Step 6: Final answer
    x = 439,722.95

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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.