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Finding the Fourth Proportional to 399,015.83, 550,655.10 and 217,737.69

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Solution

The fourth proportional to 399,015.83, 550,655.10 and 217,737.69 is: 300,485.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,015.83 : 550,655.10 = 217,737.69 : x
  2. Step 2: Convert to fraction form
    399,015.83/550,655.10 = 217,737.69/x
  3. Step 3: Cross multiply
    399,015.83x = 550,655.10 × 217,737.69
  4. Step 4: Simplify right side
    399,015.83x = 119,898,369,460.72
  5. Step 5: Solve for x
    x = 119,898,369,460.72/399,015.83
  6. Step 6: Final answer
    x = 300,485.25

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1.5x scale

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.