Home / 811,155.72-1,216,816.20-278,607.72

Finding the Fourth Proportional to 811,155.72, 1,216,816.20 and 278,607.72

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Solution

The fourth proportional to 811,155.72, 1,216,816.20 and 278,607.72 is: 417,939.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,155.72 : 1,216,816.20 = 278,607.72 : x
  2. Step 2: Convert to fraction form
    811,155.72/1,216,816.20 = 278,607.72/x
  3. Step 3: Cross multiply
    811,155.72x = 1,216,816.20 × 278,607.72
  4. Step 4: Simplify right side
    811,155.72x = 339,014,387,141.06
  5. Step 5: Solve for x
    x = 339,014,387,141.06/811,155.72
  6. Step 6: Final answer
    x = 417,939.96

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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.