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Finding the Fourth Proportional to 259,990.80, 390,059.10 and 110,302.80

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Solution

The fourth proportional to 259,990.80, 390,059.10 and 110,302.80 is: 165,485.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,990.80 : 390,059.10 = 110,302.80 : x
  2. Step 2: Convert to fraction form
    259,990.80/390,059.10 = 110,302.80/x
  3. Step 3: Cross multiply
    259,990.80x = 390,059.10 × 110,302.80
  4. Step 4: Simplify right side
    259,990.80x = 43,024,610,895.48
  5. Step 5: Solve for x
    x = 43,024,610,895.48/259,990.80
  6. Step 6: Final answer
    x = 165,485.13

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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.