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Finding the Fourth Proportional to 352,983.60, 529,692.71 and 139,715.21

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Solution

The fourth proportional to 352,983.60, 529,692.71 and 139,715.21 is: 209,658.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,983.60 : 529,692.71 = 139,715.21 : x
  2. Step 2: Convert to fraction form
    352,983.60/529,692.71 = 139,715.21/x
  3. Step 3: Cross multiply
    352,983.60x = 529,692.71 × 139,715.21
  4. Step 4: Simplify right side
    352,983.60x = 74,006,125,564.66
  5. Step 5: Solve for x
    x = 74,006,125,564.66/352,983.60
  6. Step 6: Final answer
    x = 209,658.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.