Home / 772,640.80-1,158,961.20-520,698.40

Finding the Fourth Proportional to 772,640.80, 1,158,961.20 and 520,698.40

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Solution

The fourth proportional to 772,640.80, 1,158,961.20 and 520,698.40 is: 781,047.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,640.80 : 1,158,961.20 = 520,698.40 : x
  2. Step 2: Convert to fraction form
    772,640.80/1,158,961.20 = 520,698.40/x
  3. Step 3: Cross multiply
    772,640.80x = 1,158,961.20 × 520,698.40
  4. Step 4: Simplify right side
    772,640.80x = 603,469,242,502.08
  5. Step 5: Solve for x
    x = 603,469,242,502.08/772,640.80
  6. Step 6: Final answer
    x = 781,047.60

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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.