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Finding the Fourth Proportional to 640,522.25, 883,938.57 and 354,060.76

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Solution

The fourth proportional to 640,522.25, 883,938.57 and 354,060.76 is: 488,613.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,522.25 : 883,938.57 = 354,060.76 : x
  2. Step 2: Convert to fraction form
    640,522.25/883,938.57 = 354,060.76/x
  3. Step 3: Cross multiply
    640,522.25x = 883,938.57 × 354,060.76
  4. Step 4: Simplify right side
    640,522.25x = 312,967,961,887.51
  5. Step 5: Solve for x
    x = 312,967,961,887.51/640,522.25
  6. Step 6: Final answer
    x = 488,613.72

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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.