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Finding the Fourth Proportional to 639,811.49, 959,714.51 and 260,647.65

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Solution

The fourth proportional to 639,811.49, 959,714.51 and 260,647.65 is: 390,970.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,811.49 : 959,714.51 = 260,647.65 : x
  2. Step 2: Convert to fraction form
    639,811.49/959,714.51 = 260,647.65/x
  3. Step 3: Cross multiply
    639,811.49x = 959,714.51 × 260,647.65
  4. Step 4: Simplify right side
    639,811.49x = 250,147,330,399.16
  5. Step 5: Solve for x
    x = 250,147,330,399.16/639,811.49
  6. Step 6: Final answer
    x = 390,970.37

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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.