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Finding the Fourth Proportional to 640,152.72, 883,420.02 and 353,679.39

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Solution

The fourth proportional to 640,152.72, 883,420.02 and 353,679.39 is: 488,082.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,152.72 : 883,420.02 = 353,679.39 : x
  2. Step 2: Convert to fraction form
    640,152.72/883,420.02 = 353,679.39/x
  3. Step 3: Cross multiply
    640,152.72x = 883,420.02 × 353,679.39
  4. Step 4: Simplify right side
    640,152.72x = 312,447,453,787.39
  5. Step 5: Solve for x
    x = 312,447,453,787.39/640,152.72
  6. Step 6: Final answer
    x = 488,082.68

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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.