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Finding the Fourth Proportional to 399,590.88, 551,426.04 and 218,303.76

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Solution

The fourth proportional to 399,590.88, 551,426.04 and 218,303.76 is: 301,254.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,590.88 : 551,426.04 = 218,303.76 : x
  2. Step 2: Convert to fraction form
    399,590.88/551,426.04 = 218,303.76/x
  3. Step 3: Cross multiply
    399,590.88x = 551,426.04 × 218,303.76
  4. Step 4: Simplify right side
    399,590.88x = 120,378,377,893.91
  5. Step 5: Solve for x
    x = 120,378,377,893.91/399,590.88
  6. Step 6: Final answer
    x = 301,254.07

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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.