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Finding the Fourth Proportional to 638,603.70, 881,279.25 and 352,133.94

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Solution

The fourth proportional to 638,603.70, 881,279.25 and 352,133.94 is: 485,948.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,603.70 : 881,279.25 = 352,133.94 : x
  2. Step 2: Convert to fraction form
    638,603.70/881,279.25 = 352,133.94/x
  3. Step 3: Cross multiply
    638,603.70x = 881,279.25 × 352,133.94
  4. Step 4: Simplify right side
    638,603.70x = 310,328,334,542.75
  5. Step 5: Solve for x
    x = 310,328,334,542.75/638,603.70
  6. Step 6: Final answer
    x = 485,948.23

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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.