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Finding the Fourth Proportional to 518,019.24, 777,111.90 and 218,543.93

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Solution

The fourth proportional to 518,019.24, 777,111.90 and 218,543.93 is: 327,850.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,019.24 : 777,111.90 = 218,543.93 : x
  2. Step 2: Convert to fraction form
    518,019.24/777,111.90 = 218,543.93/x
  3. Step 3: Cross multiply
    518,019.24x = 777,111.90 × 218,543.93
  4. Step 4: Simplify right side
    518,019.24x = 169,833,092,485.40
  5. Step 5: Solve for x
    x = 169,833,092,485.40/518,019.24
  6. Step 6: Final answer
    x = 327,850.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.