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Finding the Fourth Proportional to 399,679.48, 551,541.23 and 218,397.63

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Solution

The fourth proportional to 399,679.48, 551,541.23 and 218,397.63 is: 301,379.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,679.48 : 551,541.23 = 218,397.63 : x
  2. Step 2: Convert to fraction form
    399,679.48/551,541.23 = 218,397.63/x
  3. Step 3: Cross multiply
    399,679.48x = 551,541.23 × 218,397.63
  4. Step 4: Simplify right side
    399,679.48x = 120,455,297,479.29
  5. Step 5: Solve for x
    x = 120,455,297,479.29/399,679.48
  6. Step 6: Final answer
    x = 301,379.74

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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.