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Finding the Fourth Proportional to 261,800, 392,700 and 64,808

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Solution

The fourth proportional to 261,800, 392,700 and 64,808 is: 97,212

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,800 : 392,700 = 64,808 : x
  2. Step 2: Convert to fraction form
    261,800/392,700 = 64,808/x
  3. Step 3: Cross multiply
    261,800x = 392,700 × 64,808
  4. Step 4: Simplify right side
    261,800x = 25,450,101,600
  5. Step 5: Solve for x
    x = 25,450,101,600/261,800
  6. Step 6: Final answer
    x = 97,212

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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.