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Finding the Fourth Proportional to 402,035, 603,328.98 and 139,379

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Solution

The fourth proportional to 402,035, 603,328.98 and 139,379 is: 209,164.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,035 : 603,328.98 = 139,379 : x
  2. Step 2: Convert to fraction form
    402,035/603,328.98 = 139,379/x
  3. Step 3: Cross multiply
    402,035x = 603,328.98 × 139,379
  4. Step 4: Simplify right side
    402,035x = 84,091,389,903.42
  5. Step 5: Solve for x
    x = 84,091,389,903.42/402,035
  6. Step 6: Final answer
    x = 209,164.35

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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.