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Finding the Fourth Proportional to 641,603.39, 885,401.96 and 355,117.32

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Solution

The fourth proportional to 641,603.39, 885,401.96 and 355,117.32 is: 490,055.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,603.39 : 885,401.96 = 355,117.32 : x
  2. Step 2: Convert to fraction form
    641,603.39/885,401.96 = 355,117.32/x
  3. Step 3: Cross multiply
    641,603.39x = 885,401.96 × 355,117.32
  4. Step 4: Simplify right side
    641,603.39x = 314,421,569,382.36
  5. Step 5: Solve for x
    x = 314,421,569,382.36/641,603.39
  6. Step 6: Final answer
    x = 490,055.97

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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.