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Finding the Fourth Proportional to 638,146.80, 880,600.81 and 351,666.81

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Solution

The fourth proportional to 638,146.80, 880,600.81 and 351,666.81 is: 485,277.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,146.80 : 880,600.81 = 351,666.81 : x
  2. Step 2: Convert to fraction form
    638,146.80/880,600.81 = 351,666.81/x
  3. Step 3: Cross multiply
    638,146.80x = 880,600.81 × 351,666.81
  4. Step 4: Simplify right side
    638,146.80x = 309,678,077,736.12
  5. Step 5: Solve for x
    x = 309,678,077,736.12/638,146.80
  6. Step 6: Final answer
    x = 485,277.18

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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.