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Finding the Fourth Proportional to 638,186.72, 880,693.22 and 351,707.06

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Solution

The fourth proportional to 638,186.72, 880,693.22 and 351,707.06 is: 485,353.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,186.72 : 880,693.22 = 351,707.06 : x
  2. Step 2: Convert to fraction form
    638,186.72/880,693.22 = 351,707.06/x
  3. Step 3: Cross multiply
    638,186.72x = 880,693.22 × 351,707.06
  4. Step 4: Simplify right side
    638,186.72x = 309,746,026,249.13
  5. Step 5: Solve for x
    x = 309,746,026,249.13/638,186.72
  6. Step 6: Final answer
    x = 485,353.30

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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.