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Finding the Fourth Proportional to 709,192.50, 978,680.99 and 403,268.90

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Solution

The fourth proportional to 709,192.50, 978,680.99 and 403,268.90 is: 556,508.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,192.50 : 978,680.99 = 403,268.90 : x
  2. Step 2: Convert to fraction form
    709,192.50/978,680.99 = 403,268.90/x
  3. Step 3: Cross multiply
    709,192.50x = 978,680.99 × 403,268.90
  4. Step 4: Simplify right side
    709,192.50x = 394,671,602,402.98
  5. Step 5: Solve for x
    x = 394,671,602,402.98/709,192.50
  6. Step 6: Final answer
    x = 556,508.43

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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.