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Finding the Fourth Proportional to 638,157.78, 880,657.74 and 351,677.86

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Solution

The fourth proportional to 638,157.78, 880,657.74 and 351,677.86 is: 485,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,157.78 : 880,657.74 = 351,677.86 : x
  2. Step 2: Convert to fraction form
    638,157.78/880,657.74 = 351,677.86/x
  3. Step 3: Cross multiply
    638,157.78x = 880,657.74 × 351,677.86
  4. Step 4: Simplify right side
    638,157.78x = 309,707,829,395.64
  5. Step 5: Solve for x
    x = 309,707,829,395.64/638,157.78
  6. Step 6: Final answer
    x = 485,315.45

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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.