Home / 811,900.16-1,218,120.69-272,209.85

Finding the Fourth Proportional to 811,900.16, 1,218,120.69 and 272,209.85

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Solution

The fourth proportional to 811,900.16, 1,218,120.69 and 272,209.85 is: 408,405.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,900.16 : 1,218,120.69 = 272,209.85 : x
  2. Step 2: Convert to fraction form
    811,900.16/1,218,120.69 = 272,209.85/x
  3. Step 3: Cross multiply
    811,900.16x = 1,218,120.69 × 272,209.85
  4. Step 4: Simplify right side
    811,900.16x = 331,584,444,216.19
  5. Step 5: Solve for x
    x = 331,584,444,216.19/811,900.16
  6. Step 6: Final answer
    x = 408,405.45

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Double scale
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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.