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Finding the Fourth Proportional to 709,201.50, 978,564.42 and 422,748.24

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Solution

The fourth proportional to 709,201.50, 978,564.42 and 422,748.24 is: 583,312.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,201.50 : 978,564.42 = 422,748.24 : x
  2. Step 2: Convert to fraction form
    709,201.50/978,564.42 = 422,748.24/x
  3. Step 3: Cross multiply
    709,201.50x = 978,564.42 × 422,748.24
  4. Step 4: Simplify right side
    709,201.50x = 413,686,386,281.62
  5. Step 5: Solve for x
    x = 413,686,386,281.62/709,201.50
  6. Step 6: Final answer
    x = 583,312.90

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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.