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Finding the Fourth Proportional to 640,222.42, 883,505.12 and 353,740.47

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Solution

The fourth proportional to 640,222.42, 883,505.12 and 353,740.47 is: 488,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,222.42 : 883,505.12 = 353,740.47 : x
  2. Step 2: Convert to fraction form
    640,222.42/883,505.12 = 353,740.47/x
  3. Step 3: Cross multiply
    640,222.42x = 883,505.12 × 353,740.47
  4. Step 4: Simplify right side
    640,222.42x = 312,531,516,396.21
  5. Step 5: Solve for x
    x = 312,531,516,396.21/640,222.42
  6. Step 6: Final answer
    x = 488,160.84

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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.