Home / 399,985.90-551,980.88-218,698.18

Finding the Fourth Proportional to 399,985.90, 551,980.88 and 218,698.18

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Solution

The fourth proportional to 399,985.90, 551,980.88 and 218,698.18 is: 301,803.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,985.90 : 551,980.88 = 218,698.18 : x
  2. Step 2: Convert to fraction form
    399,985.90/551,980.88 = 218,698.18/x
  3. Step 3: Cross multiply
    399,985.90x = 551,980.88 × 218,698.18
  4. Step 4: Simplify right side
    399,985.90x = 120,717,212,197.47
  5. Step 5: Solve for x
    x = 120,717,212,197.47/399,985.90
  6. Step 6: Final answer
    x = 301,803.67

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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.