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Finding the Fourth Proportional to 709,003.05, 978,506.93 and 403,125.26

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Solution

The fourth proportional to 709,003.05, 978,506.93 and 403,125.26 is: 556,359.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,003.05 : 978,506.93 = 403,125.26 : x
  2. Step 2: Convert to fraction form
    709,003.05/978,506.93 = 403,125.26/x
  3. Step 3: Cross multiply
    709,003.05x = 978,506.93 × 403,125.26
  4. Step 4: Simplify right side
    709,003.05x = 394,460,860,998.69
  5. Step 5: Solve for x
    x = 394,460,860,998.69/709,003.05
  6. Step 6: Final answer
    x = 556,359.89

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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.