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Finding the Fourth Proportional to 639,257.40, 958,221.90 and 260,015.40

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Solution

The fourth proportional to 639,257.40, 958,221.90 and 260,015.40 is: 389,752.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,257.40 : 958,221.90 = 260,015.40 : x
  2. Step 2: Convert to fraction form
    639,257.40/958,221.90 = 260,015.40/x
  3. Step 3: Cross multiply
    639,257.40x = 958,221.90 × 260,015.40
  4. Step 4: Simplify right side
    639,257.40x = 249,152,450,617.26
  5. Step 5: Solve for x
    x = 249,152,450,617.26/639,257.40
  6. Step 6: Final answer
    x = 389,752.94

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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.