Home / 312,917.78-431,808.47-183,836.18

Finding the Fourth Proportional to 312,917.78, 431,808.47 and 183,836.18

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Solution

The fourth proportional to 312,917.78, 431,808.47 and 183,836.18 is: 253,683.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,917.78 : 431,808.47 = 183,836.18 : x
  2. Step 2: Convert to fraction form
    312,917.78/431,808.47 = 183,836.18/x
  3. Step 3: Cross multiply
    312,917.78x = 431,808.47 × 183,836.18
  4. Step 4: Simplify right side
    312,917.78x = 79,382,020,466.17
  5. Step 5: Solve for x
    x = 79,382,020,466.17/312,917.78
  6. Step 6: Final answer
    x = 253,683.32

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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.