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Finding the Fourth Proportional to 638,644.89, 881,323.50 and 348,255.74

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Solution

The fourth proportional to 638,644.89, 881,323.50 and 348,255.74 is: 480,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,644.89 : 881,323.50 = 348,255.74 : x
  2. Step 2: Convert to fraction form
    638,644.89/881,323.50 = 348,255.74/x
  3. Step 3: Cross multiply
    638,644.89x = 881,323.50 × 348,255.74
  4. Step 4: Simplify right side
    638,644.89x = 306,925,967,671.89
  5. Step 5: Solve for x
    x = 306,925,967,671.89/638,644.89
  6. Step 6: Final answer
    x = 480,589.40

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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.