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Finding the Fourth Proportional to 640,500.64, 883,909.67 and 350,128.25

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Solution

The fourth proportional to 640,500.64, 883,909.67 and 350,128.25 is: 483,187.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,500.64 : 883,909.67 = 350,128.25 : x
  2. Step 2: Convert to fraction form
    640,500.64/883,909.67 = 350,128.25/x
  3. Step 3: Cross multiply
    640,500.64x = 883,909.67 × 350,128.25
  4. Step 4: Simplify right side
    640,500.64x = 309,481,745,915.18
  5. Step 5: Solve for x
    x = 309,481,745,915.18/640,500.64
  6. Step 6: Final answer
    x = 483,187.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.