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Finding the Fourth Proportional to 709,181.12, 978,630.08 and 403,331.90

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Solution

The fourth proportional to 709,181.12, 978,630.08 and 403,331.90 is: 556,575.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,181.12 : 978,630.08 = 403,331.90 : x
  2. Step 2: Convert to fraction form
    709,181.12/978,630.08 = 403,331.90/x
  3. Step 3: Cross multiply
    709,181.12x = 978,630.08 × 403,331.90
  4. Step 4: Simplify right side
    709,181.12x = 394,712,722,653.74
  5. Step 5: Solve for x
    x = 394,712,722,653.74/709,181.12
  6. Step 6: Final answer
    x = 556,575.34

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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.