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Finding the Fourth Proportional to 636,455.70, 878,331.42 and 349,997.58

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Solution

The fourth proportional to 636,455.70, 878,331.42 and 349,997.58 is: 483,009.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,455.70 : 878,331.42 = 349,997.58 : x
  2. Step 2: Convert to fraction form
    636,455.70/878,331.42 = 349,997.58/x
  3. Step 3: Cross multiply
    636,455.70x = 878,331.42 × 349,997.58
  4. Step 4: Simplify right side
    636,455.70x = 307,413,871,437.96
  5. Step 5: Solve for x
    x = 307,413,871,437.96/636,455.70
  6. Step 6: Final answer
    x = 483,009.06

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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.