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Finding the Fourth Proportional to 660,480.55, 990,408.57 and 255,862.28

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Solution

The fourth proportional to 660,480.55, 990,408.57 and 255,862.28 is: 383,672.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,480.55 : 990,408.57 = 255,862.28 : x
  2. Step 2: Convert to fraction form
    660,480.55/990,408.57 = 255,862.28/x
  3. Step 3: Cross multiply
    660,480.55x = 990,408.57 × 255,862.28
  4. Step 4: Simplify right side
    660,480.55x = 253,408,190,797.23
  5. Step 5: Solve for x
    x = 253,408,190,797.23/660,480.55
  6. Step 6: Final answer
    x = 383,672.45

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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.