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Finding the Fourth Proportional to 551,548.74, 761,054.37 and 309,785.01

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Solution

The fourth proportional to 551,548.74, 761,054.37 and 309,785.01 is: 427,456.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,548.74 : 761,054.37 = 309,785.01 : x
  2. Step 2: Convert to fraction form
    551,548.74/761,054.37 = 309,785.01/x
  3. Step 3: Cross multiply
    551,548.74x = 761,054.37 × 309,785.01
  4. Step 4: Simplify right side
    551,548.74x = 235,763,231,605.35
  5. Step 5: Solve for x
    x = 235,763,231,605.35/551,548.74
  6. Step 6: Final answer
    x = 427,456.75

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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.