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Finding the Fourth Proportional to 638,339.94, 880,948.53 and 351,859.38

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Solution

The fourth proportional to 638,339.94, 880,948.53 and 351,859.38 is: 485,587.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,339.94 : 880,948.53 = 351,859.38 : x
  2. Step 2: Convert to fraction form
    638,339.94/880,948.53 = 351,859.38/x
  3. Step 3: Cross multiply
    638,339.94x = 880,948.53 × 351,859.38
  4. Step 4: Simplify right side
    638,339.94x = 309,970,003,577.71
  5. Step 5: Solve for x
    x = 309,970,003,577.71/638,339.94
  6. Step 6: Final answer
    x = 485,587.67

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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.