Home / 399,292.18-551,008.74-218,000.77

Finding the Fourth Proportional to 399,292.18, 551,008.74 and 218,000.77

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Solution

The fourth proportional to 399,292.18, 551,008.74 and 218,000.77 is: 300,833.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,292.18 : 551,008.74 = 218,000.77 : x
  2. Step 2: Convert to fraction form
    399,292.18/551,008.74 = 218,000.77/x
  3. Step 3: Cross multiply
    399,292.18x = 551,008.74 × 218,000.77
  4. Step 4: Simplify right side
    399,292.18x = 120,120,329,596.73
  5. Step 5: Solve for x
    x = 120,120,329,596.73/399,292.18
  6. Step 6: Final answer
    x = 300,833.16

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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.