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Finding the Fourth Proportional to 402,036, 603,330.48 and 139,380

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Solution

The fourth proportional to 402,036, 603,330.48 and 139,380 is: 209,165.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,036 : 603,330.48 = 139,380 : x
  2. Step 2: Convert to fraction form
    402,036/603,330.48 = 139,380/x
  3. Step 3: Cross multiply
    402,036x = 603,330.48 × 139,380
  4. Step 4: Simplify right side
    402,036x = 84,092,202,302.40
  5. Step 5: Solve for x
    x = 84,092,202,302.40/402,036
  6. Step 6: Final answer
    x = 209,165.85

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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.