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Finding the Fourth Proportional to 399,640.16, 599,580.12 and 168,938.48

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Solution

The fourth proportional to 399,640.16, 599,580.12 and 168,938.48 is: 253,458.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,640.16 : 599,580.12 = 168,938.48 : x
  2. Step 2: Convert to fraction form
    399,640.16/599,580.12 = 168,938.48/x
  3. Step 3: Cross multiply
    399,640.16x = 599,580.12 × 168,938.48
  4. Step 4: Simplify right side
    399,640.16x = 101,292,154,111.02
  5. Step 5: Solve for x
    x = 101,292,154,111.02/399,640.16
  6. Step 6: Final answer
    x = 253,458.40

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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.