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Finding the Fourth Proportional to 850,672.60, 1,276,008.90 and 429,893.80

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Solution

The fourth proportional to 850,672.60, 1,276,008.90 and 429,893.80 is: 644,840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    850,672.60 : 1,276,008.90 = 429,893.80 : x
  2. Step 2: Convert to fraction form
    850,672.60/1,276,008.90 = 429,893.80/x
  3. Step 3: Cross multiply
    850,672.60x = 1,276,008.90 × 429,893.80
  4. Step 4: Simplify right side
    850,672.60x = 548,548,314,854.82
  5. Step 5: Solve for x
    x = 548,548,314,854.82/850,672.60
  6. Step 6: Final answer
    x = 644,840.70

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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.