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Finding the Fourth Proportional to 680,708.88, 939,361.80 and 426,200.40

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Solution

The fourth proportional to 680,708.88, 939,361.80 and 426,200.40 is: 588,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,708.88 : 939,361.80 = 426,200.40 : x
  2. Step 2: Convert to fraction form
    680,708.88/939,361.80 = 426,200.40/x
  3. Step 3: Cross multiply
    680,708.88x = 939,361.80 × 426,200.40
  4. Step 4: Simplify right side
    680,708.88x = 400,356,374,904.72
  5. Step 5: Solve for x
    x = 400,356,374,904.72/680,708.88
  6. Step 6: Final answer
    x = 588,146.25

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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.