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Finding the Fourth Proportional to 640,041.35, 959,498.06 and 261,280.28

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Solution

The fourth proportional to 640,041.35, 959,498.06 and 261,280.28 is: 391,690.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,041.35 : 959,498.06 = 261,280.28 : x
  2. Step 2: Convert to fraction form
    640,041.35/959,498.06 = 261,280.28/x
  3. Step 3: Cross multiply
    640,041.35x = 959,498.06 × 261,280.28
  4. Step 4: Simplify right side
    640,041.35x = 250,697,922,868.60
  5. Step 5: Solve for x
    x = 250,697,922,868.60/640,041.35
  6. Step 6: Final answer
    x = 391,690.20

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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.