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Finding the Fourth Proportional to 641,585.39, 885,377.12 and 355,099.32

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Solution

The fourth proportional to 641,585.39, 885,377.12 and 355,099.32 is: 490,031.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,585.39 : 885,377.12 = 355,099.32 : x
  2. Step 2: Convert to fraction form
    641,585.39/885,377.12 = 355,099.32/x
  3. Step 3: Cross multiply
    641,585.39x = 885,377.12 × 355,099.32
  4. Step 4: Simplify right side
    641,585.39x = 314,396,811,480.06
  5. Step 5: Solve for x
    x = 314,396,811,480.06/641,585.39
  6. Step 6: Final answer
    x = 490,031.13

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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.