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Finding the Fourth Proportional to 399,030.07, 550,644.38 and 217,737.49

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Solution

The fourth proportional to 399,030.07, 550,644.38 and 217,737.49 is: 300,468.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,030.07 : 550,644.38 = 217,737.49 : x
  2. Step 2: Convert to fraction form
    399,030.07/550,644.38 = 217,737.49/x
  3. Step 3: Cross multiply
    399,030.07x = 550,644.38 × 217,737.49
  4. Step 4: Simplify right side
    399,030.07x = 119,895,922,430.58
  5. Step 5: Solve for x
    x = 119,895,922,430.58/399,030.07
  6. Step 6: Final answer
    x = 300,468.39

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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.