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Finding the Fourth Proportional to 709,328.75, 978,739.75 and 422,875.49

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Solution

The fourth proportional to 709,328.75, 978,739.75 and 422,875.49 is: 583,488.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,328.75 : 978,739.75 = 422,875.49 : x
  2. Step 2: Convert to fraction form
    709,328.75/978,739.75 = 422,875.49/x
  3. Step 3: Cross multiply
    709,328.75x = 978,739.75 × 422,875.49
  4. Step 4: Simplify right side
    709,328.75x = 413,885,051,363.73
  5. Step 5: Solve for x
    x = 413,885,051,363.73/709,328.75
  6. Step 6: Final answer
    x = 583,488.34

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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.