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Finding the Fourth Proportional to 286,012.78, 394,697.68 and 158,688.08

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Solution

The fourth proportional to 286,012.78, 394,697.68 and 158,688.08 is: 218,989.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,012.78 : 394,697.68 = 158,688.08 : x
  2. Step 2: Convert to fraction form
    286,012.78/394,697.68 = 158,688.08/x
  3. Step 3: Cross multiply
    286,012.78x = 394,697.68 × 158,688.08
  4. Step 4: Simplify right side
    286,012.78x = 62,633,817,019.65
  5. Step 5: Solve for x
    x = 62,633,817,019.65/286,012.78
  6. Step 6: Final answer
    x = 218,989.57

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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.