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Finding the Fourth Proportional to 587,789.40, 879,840.90 and 421,901.40

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Solution

The fourth proportional to 587,789.40, 879,840.90 and 421,901.40 is: 631,529.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,789.40 : 879,840.90 = 421,901.40 : x
  2. Step 2: Convert to fraction form
    587,789.40/879,840.90 = 421,901.40/x
  3. Step 3: Cross multiply
    587,789.40x = 879,840.90 × 421,901.40
  4. Step 4: Simplify right side
    587,789.40x = 371,206,107,487.26
  5. Step 5: Solve for x
    x = 371,206,107,487.26/587,789.40
  6. Step 6: Final answer
    x = 631,529.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.