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Finding the Fourth Proportional to 708,944.31, 978,427.26 and 403,066.85

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Solution

The fourth proportional to 708,944.31, 978,427.26 and 403,066.85 is: 556,280.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,944.31 : 978,427.26 = 403,066.85 : x
  2. Step 2: Convert to fraction form
    708,944.31/978,427.26 = 403,066.85/x
  3. Step 3: Cross multiply
    708,944.31x = 978,427.26 × 403,066.85
  4. Step 4: Simplify right side
    708,944.31x = 394,371,588,750.20
  5. Step 5: Solve for x
    x = 394,371,588,750.20/708,944.31
  6. Step 6: Final answer
    x = 556,280.07

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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.