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Finding the Fourth Proportional to 682,708.80, 942,134.88 and 380,902.08

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Solution

The fourth proportional to 682,708.80, 942,134.88 and 380,902.08 is: 525,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    682,708.80 : 942,134.88 = 380,902.08 : x
  2. Step 2: Convert to fraction form
    682,708.80/942,134.88 = 380,902.08/x
  3. Step 3: Cross multiply
    682,708.80x = 942,134.88 × 380,902.08
  4. Step 4: Simplify right side
    682,708.80x = 358,861,135,432.55
  5. Step 5: Solve for x
    x = 358,861,135,432.55/682,708.80
  6. Step 6: Final answer
    x = 525,643.05

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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.