Home / 840,840.60-1,259,875.80-485,234.40

Finding the Fourth Proportional to 840,840.60, 1,259,875.80 and 485,234.40

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Solution

The fourth proportional to 840,840.60, 1,259,875.80 and 485,234.40 is: 727,052.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,840.60 : 1,259,875.80 = 485,234.40 : x
  2. Step 2: Convert to fraction form
    840,840.60/1,259,875.80 = 485,234.40/x
  3. Step 3: Cross multiply
    840,840.60x = 1,259,875.80 × 485,234.40
  4. Step 4: Simplify right side
    840,840.60x = 611,335,077,887.52
  5. Step 5: Solve for x
    x = 611,335,077,887.52/840,840.60
  6. Step 6: Final answer
    x = 727,052.28

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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.