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Finding the Fourth Proportional to 638,142.54, 880,625.36 and 347,756.70

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Solution

The fourth proportional to 638,142.54, 880,625.36 and 347,756.70 is: 479,898.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,142.54 : 880,625.36 = 347,756.70 : x
  2. Step 2: Convert to fraction form
    638,142.54/880,625.36 = 347,756.70/x
  3. Step 3: Cross multiply
    638,142.54x = 880,625.36 × 347,756.70
  4. Step 4: Simplify right side
    638,142.54x = 306,243,369,129.91
  5. Step 5: Solve for x
    x = 306,243,369,129.91/638,142.54
  6. Step 6: Final answer
    x = 479,898.06

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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.