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Finding the Fourth Proportional to 426,326.40, 640,612.80 and 236,937.60

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Solution

The fourth proportional to 426,326.40, 640,612.80 and 236,937.60 is: 356,030.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,326.40 : 640,612.80 = 236,937.60 : x
  2. Step 2: Convert to fraction form
    426,326.40/640,612.80 = 236,937.60/x
  3. Step 3: Cross multiply
    426,326.40x = 640,612.80 × 236,937.60
  4. Step 4: Simplify right side
    426,326.40x = 151,785,259,361.28
  5. Step 5: Solve for x
    x = 151,785,259,361.28/426,326.40
  6. Step 6: Final answer
    x = 356,030.64

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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.