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Finding the Fourth Proportional to 680,470.40, 939,041.70 and 374,540.24

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Solution

The fourth proportional to 680,470.40, 939,041.70 and 374,540.24 is: 516,861.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,470.40 : 939,041.70 = 374,540.24 : x
  2. Step 2: Convert to fraction form
    680,470.40/939,041.70 = 374,540.24/x
  3. Step 3: Cross multiply
    680,470.40x = 939,041.70 × 374,540.24
  4. Step 4: Simplify right side
    680,470.40x = 351,708,903,688.01
  5. Step 5: Solve for x
    x = 351,708,903,688.01/680,470.40
  6. Step 6: Final answer
    x = 516,861.43

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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.