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Finding the Fourth Proportional to 261,354.34, 360,690.73 and 145,078.75

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Solution

The fourth proportional to 261,354.34, 360,690.73 and 145,078.75 is: 200,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,354.34 : 360,690.73 = 145,078.75 : x
  2. Step 2: Convert to fraction form
    261,354.34/360,690.73 = 145,078.75/x
  3. Step 3: Cross multiply
    261,354.34x = 360,690.73 × 145,078.75
  4. Step 4: Simplify right side
    261,354.34x = 52,328,558,980.56
  5. Step 5: Solve for x
    x = 52,328,558,980.56/261,354.34
  6. Step 6: Final answer
    x = 200,220.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.