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Finding the Fourth Proportional to 399,323.66, 551,069.34 and 218,036.85

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Solution

The fourth proportional to 399,323.66, 551,069.34 and 218,036.85 is: 300,892.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,323.66 : 551,069.34 = 218,036.85 : x
  2. Step 2: Convert to fraction form
    399,323.66/551,069.34 = 218,036.85/x
  3. Step 3: Cross multiply
    399,323.66x = 551,069.34 × 218,036.85
  4. Step 4: Simplify right side
    399,323.66x = 120,153,423,025.18
  5. Step 5: Solve for x
    x = 120,153,423,025.18/399,323.66
  6. Step 6: Final answer
    x = 300,892.32

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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.