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Finding the Fourth Proportional to 551,443.05, 760,994.46 and 309,725.64

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Solution

The fourth proportional to 551,443.05, 760,994.46 and 309,725.64 is: 427,423.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,443.05 : 760,994.46 = 309,725.64 : x
  2. Step 2: Convert to fraction form
    551,443.05/760,994.46 = 309,725.64/x
  3. Step 3: Cross multiply
    551,443.05x = 760,994.46 × 309,725.64
  4. Step 4: Simplify right side
    551,443.05x = 235,699,496,159.95
  5. Step 5: Solve for x
    x = 235,699,496,159.95/551,443.05
  6. Step 6: Final answer
    x = 427,423.10

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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.