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Finding the Fourth Proportional to 399,258.80, 598,888.20 and 310,029.20

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Solution

The fourth proportional to 399,258.80, 598,888.20 and 310,029.20 is: 465,043.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,258.80 : 598,888.20 = 310,029.20 : x
  2. Step 2: Convert to fraction form
    399,258.80/598,888.20 = 310,029.20/x
  3. Step 3: Cross multiply
    399,258.80x = 598,888.20 × 310,029.20
  4. Step 4: Simplify right side
    399,258.80x = 185,672,829,535.44
  5. Step 5: Solve for x
    x = 185,672,829,535.44/399,258.80
  6. Step 6: Final answer
    x = 465,043.80

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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.