Home / 812,878.60-1,218,005.70-512,822.20

Finding the Fourth Proportional to 812,878.60, 1,218,005.70 and 512,822.20

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Solution

The fourth proportional to 812,878.60, 1,218,005.70 and 512,822.20 is: 768,405.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,878.60 : 1,218,005.70 = 512,822.20 : x
  2. Step 2: Convert to fraction form
    812,878.60/1,218,005.70 = 512,822.20/x
  3. Step 3: Cross multiply
    812,878.60x = 1,218,005.70 × 512,822.20
  4. Step 4: Simplify right side
    812,878.60x = 624,620,362,686.54
  5. Step 5: Solve for x
    x = 624,620,362,686.54/812,878.60
  6. Step 6: Final answer
    x = 768,405.47

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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.