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Finding the Fourth Proportional to 286,038.87, 394,742.60 and 158,726.31

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Solution

The fourth proportional to 286,038.87, 394,742.60 and 158,726.31 is: 219,047.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,038.87 : 394,742.60 = 158,726.31 : x
  2. Step 2: Convert to fraction form
    286,038.87/394,742.60 = 158,726.31/x
  3. Step 3: Cross multiply
    286,038.87x = 394,742.60 × 158,726.31
  4. Step 4: Simplify right side
    286,038.87x = 62,656,036,297.81
  5. Step 5: Solve for x
    x = 62,656,036,297.81/286,038.87
  6. Step 6: Final answer
    x = 219,047.28

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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.