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Finding the Fourth Proportional to 640,188.28, 883,436 and 353,702.24

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Solution

The fourth proportional to 640,188.28, 883,436 and 353,702.24 is: 488,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,188.28 : 883,436 = 353,702.24 : x
  2. Step 2: Convert to fraction form
    640,188.28/883,436 = 353,702.24/x
  3. Step 3: Cross multiply
    640,188.28x = 883,436 × 353,702.24
  4. Step 4: Simplify right side
    640,188.28x = 312,473,292,096.64
  5. Step 5: Solve for x
    x = 312,473,292,096.64/640,188.28
  6. Step 6: Final answer
    x = 488,095.93

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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.