Home / 399,312.04-551,034.84-218,031.60

Finding the Fourth Proportional to 399,312.04, 551,034.84 and 218,031.60

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Solution

The fourth proportional to 399,312.04, 551,034.84 and 218,031.60 is: 300,874.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,312.04 : 551,034.84 = 218,031.60 : x
  2. Step 2: Convert to fraction form
    399,312.04/551,034.84 = 218,031.60/x
  3. Step 3: Cross multiply
    399,312.04x = 551,034.84 × 218,031.60
  4. Step 4: Simplify right side
    399,312.04x = 120,143,007,820.94
  5. Step 5: Solve for x
    x = 120,143,007,820.94/399,312.04
  6. Step 6: Final answer
    x = 300,874.99

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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.