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Finding the Fourth Proportional to 640,550.40, 883,944 and 354,063.12

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Solution

The fourth proportional to 640,550.40, 883,944 and 354,063.12 is: 488,598.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,550.40 : 883,944 = 354,063.12 : x
  2. Step 2: Convert to fraction form
    640,550.40/883,944 = 354,063.12/x
  3. Step 3: Cross multiply
    640,550.40x = 883,944 × 354,063.12
  4. Step 4: Simplify right side
    640,550.40x = 312,971,970,545.28
  5. Step 5: Solve for x
    x = 312,971,970,545.28/640,550.40
  6. Step 6: Final answer
    x = 488,598.51

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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.