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Finding the Fourth Proportional to 836,655.40, 1,255,674.30 and 388,066.60

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Solution

The fourth proportional to 836,655.40, 1,255,674.30 and 388,066.60 is: 582,420.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    836,655.40 : 1,255,674.30 = 388,066.60 : x
  2. Step 2: Convert to fraction form
    836,655.40/1,255,674.30 = 388,066.60/x
  3. Step 3: Cross multiply
    836,655.40x = 1,255,674.30 × 388,066.60
  4. Step 4: Simplify right side
    836,655.40x = 487,285,256,308.38
  5. Step 5: Solve for x
    x = 487,285,256,308.38/836,655.40
  6. Step 6: Final answer
    x = 582,420.50

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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.