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Finding the Fourth Proportional to 349,086.10, 523,629.15 and 260,512.60

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Solution

The fourth proportional to 349,086.10, 523,629.15 and 260,512.60 is: 390,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,086.10 : 523,629.15 = 260,512.60 : x
  2. Step 2: Convert to fraction form
    349,086.10/523,629.15 = 260,512.60/x
  3. Step 3: Cross multiply
    349,086.10x = 523,629.15 × 260,512.60
  4. Step 4: Simplify right side
    349,086.10x = 136,411,991,302.29
  5. Step 5: Solve for x
    x = 136,411,991,302.29/349,086.10
  6. Step 6: Final answer
    x = 390,768.90

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1.5x scale

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.