Home / 399,799.23-551,707.95-218,509.68

Finding the Fourth Proportional to 399,799.23, 551,707.95 and 218,509.68

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Solution

The fourth proportional to 399,799.23, 551,707.95 and 218,509.68 is: 301,535.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,799.23 : 551,707.95 = 218,509.68 : x
  2. Step 2: Convert to fraction form
    399,799.23/551,707.95 = 218,509.68/x
  3. Step 3: Cross multiply
    399,799.23x = 551,707.95 × 218,509.68
  4. Step 4: Simplify right side
    399,799.23x = 120,553,524,849.42
  5. Step 5: Solve for x
    x = 120,553,524,849.42/399,799.23
  6. Step 6: Final answer
    x = 301,535.16

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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.