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Finding the Fourth Proportional to 643,501.48, 888,015.12 and 353,112.16

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Solution

The fourth proportional to 643,501.48, 888,015.12 and 353,112.16 is: 487,285.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,501.48 : 888,015.12 = 353,112.16 : x
  2. Step 2: Convert to fraction form
    643,501.48/888,015.12 = 353,112.16/x
  3. Step 3: Cross multiply
    643,501.48x = 888,015.12 × 353,112.16
  4. Step 4: Simplify right side
    643,501.48x = 313,568,937,135.86
  5. Step 5: Solve for x
    x = 313,568,937,135.86/643,501.48
  6. Step 6: Final answer
    x = 487,285.49

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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.