Home / 399,002.40-597,985.20-288,064.80

Finding the Fourth Proportional to 399,002.40, 597,985.20 and 288,064.80

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Solution

The fourth proportional to 399,002.40, 597,985.20 and 288,064.80 is: 431,722.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,002.40 : 597,985.20 = 288,064.80 : x
  2. Step 2: Convert to fraction form
    399,002.40/597,985.20 = 288,064.80/x
  3. Step 3: Cross multiply
    399,002.40x = 597,985.20 × 288,064.80
  4. Step 4: Simplify right side
    399,002.40x = 172,258,487,040.96
  5. Step 5: Solve for x
    x = 172,258,487,040.96/399,002.40
  6. Step 6: Final answer
    x = 431,722.93

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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.