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Finding the Fourth Proportional to 640,673.15, 884,091.03 and 354,176.15

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Solution

The fourth proportional to 640,673.15, 884,091.03 and 354,176.15 is: 488,742.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,673.15 : 884,091.03 = 354,176.15 : x
  2. Step 2: Convert to fraction form
    640,673.15/884,091.03 = 354,176.15/x
  3. Step 3: Cross multiply
    640,673.15x = 884,091.03 × 354,176.15
  4. Step 4: Simplify right side
    640,673.15x = 313,123,957,254.94
  5. Step 5: Solve for x
    x = 313,123,957,254.94/640,673.15
  6. Step 6: Final answer
    x = 488,742.13

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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.