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Finding the Fourth Proportional to 638,172.53, 880,696.55 and 351,711.07

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Solution

The fourth proportional to 638,172.53, 880,696.55 and 351,711.07 is: 485,371.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,172.53 : 880,696.55 = 351,711.07 : x
  2. Step 2: Convert to fraction form
    638,172.53/880,696.55 = 351,711.07/x
  3. Step 3: Cross multiply
    638,172.53x = 880,696.55 × 351,711.07
  4. Step 4: Simplify right side
    638,172.53x = 309,750,725,945.81
  5. Step 5: Solve for x
    x = 309,750,725,945.81/638,172.53
  6. Step 6: Final answer
    x = 485,371.45

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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.