Home / 640,868.90-960,266.55-403,787.30

Finding the Fourth Proportional to 640,868.90, 960,266.55 and 403,787.30

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Solution

The fourth proportional to 640,868.90, 960,266.55 and 403,787.30 is: 605,027.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,868.90 : 960,266.55 = 403,787.30 : x
  2. Step 2: Convert to fraction form
    640,868.90/960,266.55 = 403,787.30/x
  3. Step 3: Cross multiply
    640,868.90x = 960,266.55 × 403,787.30
  4. Step 4: Simplify right side
    640,868.90x = 387,743,437,504.82
  5. Step 5: Solve for x
    x = 387,743,437,504.82/640,868.90
  6. Step 6: Final answer
    x = 605,027.70

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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.