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Finding the Fourth Proportional to 551,135.79, 760,579.20 and 309,424.91

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Solution

The fourth proportional to 551,135.79, 760,579.20 and 309,424.91 is: 427,013.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,135.79 : 760,579.20 = 309,424.91 : x
  2. Step 2: Convert to fraction form
    551,135.79/760,579.20 = 309,424.91/x
  3. Step 3: Cross multiply
    551,135.79x = 760,579.20 × 309,424.91
  4. Step 4: Simplify right side
    551,135.79x = 235,342,146,704.98
  5. Step 5: Solve for x
    x = 235,342,146,704.98/551,135.79
  6. Step 6: Final answer
    x = 427,013.00

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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.