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Finding the Fourth Proportional to 426,552.40, 639,521.40 and 239,621.20

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Solution

The fourth proportional to 426,552.40, 639,521.40 and 239,621.20 is: 359,259.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,552.40 : 639,521.40 = 239,621.20 : x
  2. Step 2: Convert to fraction form
    426,552.40/639,521.40 = 239,621.20/x
  3. Step 3: Cross multiply
    426,552.40x = 639,521.40 × 239,621.20
  4. Step 4: Simplify right side
    426,552.40x = 153,242,885,293.68
  5. Step 5: Solve for x
    x = 153,242,885,293.68/426,552.40
  6. Step 6: Final answer
    x = 359,259.23

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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.