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Finding the Fourth Proportional to 639,689.06, 959,477.88 and 260,649.74

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Solution

The fourth proportional to 639,689.06, 959,477.88 and 260,649.74 is: 390,951.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,689.06 : 959,477.88 = 260,649.74 : x
  2. Step 2: Convert to fraction form
    639,689.06/959,477.88 = 260,649.74/x
  3. Step 3: Cross multiply
    639,689.06x = 959,477.88 × 260,649.74
  4. Step 4: Simplify right side
    639,689.06x = 250,087,659,957.75
  5. Step 5: Solve for x
    x = 250,087,659,957.75/639,689.06
  6. Step 6: Final answer
    x = 390,951.91

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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.