Home / 399,768.04-551,681.32-218,479.90

Finding the Fourth Proportional to 399,768.04, 551,681.32 and 218,479.90

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Solution

The fourth proportional to 399,768.04, 551,681.32 and 218,479.90 is: 301,503.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,768.04 : 551,681.32 = 218,479.90 : x
  2. Step 2: Convert to fraction form
    399,768.04/551,681.32 = 218,479.90/x
  3. Step 3: Cross multiply
    399,768.04x = 551,681.32 × 218,479.90
  4. Step 4: Simplify right side
    399,768.04x = 120,531,279,625.47
  5. Step 5: Solve for x
    x = 120,531,279,625.47/399,768.04
  6. Step 6: Final answer
    x = 301,503.04

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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.