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Finding the Fourth Proportional to 639,788.90, 959,680.59 and 260,625.06

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Solution

The fourth proportional to 639,788.90, 959,680.59 and 260,625.06 is: 390,936.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,788.90 : 959,680.59 = 260,625.06 : x
  2. Step 2: Convert to fraction form
    639,788.90/959,680.59 = 260,625.06/x
  3. Step 3: Cross multiply
    639,788.90x = 959,680.59 × 260,625.06
  4. Step 4: Simplify right side
    639,788.90x = 250,116,811,838.26
  5. Step 5: Solve for x
    x = 250,116,811,838.26/639,788.90
  6. Step 6: Final answer
    x = 390,936.47

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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.