Home / 790,912.15-1,091,478.78-485,157.13

Finding the Fourth Proportional to 790,912.15, 1,091,478.78 and 485,157.13

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Solution

The fourth proportional to 790,912.15, 1,091,478.78 and 485,157.13 is: 669,529.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,912.15 : 1,091,478.78 = 485,157.13 : x
  2. Step 2: Convert to fraction form
    790,912.15/1,091,478.78 = 485,157.13/x
  3. Step 3: Cross multiply
    790,912.15x = 1,091,478.78 × 485,157.13
  4. Step 4: Simplify right side
    790,912.15x = 529,538,712,360.70
  5. Step 5: Solve for x
    x = 529,538,712,360.70/790,912.15
  6. Step 6: Final answer
    x = 669,529.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.