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Finding the Fourth Proportional to 551,130.87, 760,604.54 and 309,429.30

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Solution

The fourth proportional to 551,130.87, 760,604.54 and 309,429.30 is: 427,037.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,130.87 : 760,604.54 = 309,429.30 : x
  2. Step 2: Convert to fraction form
    551,130.87/760,604.54 = 309,429.30/x
  3. Step 3: Cross multiply
    551,130.87x = 760,604.54 × 309,429.30
  4. Step 4: Simplify right side
    551,130.87x = 235,353,328,841.88
  5. Step 5: Solve for x
    x = 235,353,328,841.88/551,130.87
  6. Step 6: Final answer
    x = 427,037.10

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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.