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Finding the Fourth Proportional to 426,783.42, 640,175.13 and 127,474.26

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Solution

The fourth proportional to 426,783.42, 640,175.13 and 127,474.26 is: 191,211.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,783.42 : 640,175.13 = 127,474.26 : x
  2. Step 2: Convert to fraction form
    426,783.42/640,175.13 = 127,474.26/x
  3. Step 3: Cross multiply
    426,783.42x = 640,175.13 × 127,474.26
  4. Step 4: Simplify right side
    426,783.42x = 81,605,850,967.15
  5. Step 5: Solve for x
    x = 81,605,850,967.15/426,783.42
  6. Step 6: Final answer
    x = 191,211.39

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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.