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Finding the Fourth Proportional to 643,497.89, 888,010.16 and 353,108.57

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Solution

The fourth proportional to 643,497.89, 888,010.16 and 353,108.57 is: 487,280.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,497.89 : 888,010.16 = 353,108.57 : x
  2. Step 2: Convert to fraction form
    643,497.89/888,010.16 = 353,108.57/x
  3. Step 3: Cross multiply
    643,497.89x = 888,010.16 × 353,108.57
  4. Step 4: Simplify right side
    643,497.89x = 313,563,994,516.83
  5. Step 5: Solve for x
    x = 313,563,994,516.83/643,497.89
  6. Step 6: Final answer
    x = 487,280.53

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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.