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Finding the Fourth Proportional to 261,621, 392,490 and 95,409

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Solution

The fourth proportional to 261,621, 392,490 and 95,409 is: 143,134.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,621 : 392,490 = 95,409 : x
  2. Step 2: Convert to fraction form
    261,621/392,490 = 95,409/x
  3. Step 3: Cross multiply
    261,621x = 392,490 × 95,409
  4. Step 4: Simplify right side
    261,621x = 37,447,078,410
  5. Step 5: Solve for x
    x = 37,447,078,410/261,621
  6. Step 6: Final answer
    x = 143,134.83

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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.