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Finding the Fourth Proportional to 638,126.88, 880,603.74 and 347,740.98

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Solution

The fourth proportional to 638,126.88, 880,603.74 and 347,740.98 is: 479,876.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,126.88 : 880,603.74 = 347,740.98 : x
  2. Step 2: Convert to fraction form
    638,126.88/880,603.74 = 347,740.98/x
  3. Step 3: Cross multiply
    638,126.88x = 880,603.74 × 347,740.98
  4. Step 4: Simplify right side
    638,126.88x = 306,222,007,539.27
  5. Step 5: Solve for x
    x = 306,222,007,539.27/638,126.88
  6. Step 6: Final answer
    x = 479,876.36

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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.