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Finding the Fourth Proportional to 423,554.06, 635,409.04 and 139,260.66

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Solution

The fourth proportional to 423,554.06, 635,409.04 and 139,260.66 is: 208,916.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,554.06 : 635,409.04 = 139,260.66 : x
  2. Step 2: Convert to fraction form
    423,554.06/635,409.04 = 139,260.66/x
  3. Step 3: Cross multiply
    423,554.06x = 635,409.04 × 139,260.66
  4. Step 4: Simplify right side
    423,554.06x = 88,487,482,280.37
  5. Step 5: Solve for x
    x = 88,487,482,280.37/423,554.06
  6. Step 6: Final answer
    x = 208,916.62

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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.