Home / 818,721.36-1,227,834.18-286,143.12

Finding the Fourth Proportional to 818,721.36, 1,227,834.18 and 286,143.12

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Solution

The fourth proportional to 818,721.36, 1,227,834.18 and 286,143.12 is: 429,128.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,721.36 : 1,227,834.18 = 286,143.12 : x
  2. Step 2: Convert to fraction form
    818,721.36/1,227,834.18 = 286,143.12/x
  3. Step 3: Cross multiply
    818,721.36x = 1,227,834.18 × 286,143.12
  4. Step 4: Simplify right side
    818,721.36x = 351,336,303,107.84
  5. Step 5: Solve for x
    x = 351,336,303,107.84/818,721.36
  6. Step 6: Final answer
    x = 429,128.05

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Half scale
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Double scale
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Similar ratio
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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.