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Finding the Fourth Proportional to 689,174.35, 950,921.20 and 402,639.10

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Solution

The fourth proportional to 689,174.35, 950,921.20 and 402,639.10 is: 555,560.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,174.35 : 950,921.20 = 402,639.10 : x
  2. Step 2: Convert to fraction form
    689,174.35/950,921.20 = 402,639.10/x
  3. Step 3: Cross multiply
    689,174.35x = 950,921.20 × 402,639.10
  4. Step 4: Simplify right side
    689,174.35x = 382,878,056,138.92
  5. Step 5: Solve for x
    x = 382,878,056,138.92/689,174.35
  6. Step 6: Final answer
    x = 555,560.51

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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.