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Finding the Fourth Proportional to 640,576.80, 960,427.80 and 303,778.80

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Solution

The fourth proportional to 640,576.80, 960,427.80 and 303,778.80 is: 455,460.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,576.80 : 960,427.80 = 303,778.80 : x
  2. Step 2: Convert to fraction form
    640,576.80/960,427.80 = 303,778.80/x
  3. Step 3: Cross multiply
    640,576.80x = 960,427.80 × 303,778.80
  4. Step 4: Simplify right side
    640,576.80x = 291,757,604,570.64
  5. Step 5: Solve for x
    x = 291,757,604,570.64/640,576.80
  6. Step 6: Final answer
    x = 455,460.77

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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.