Home / 1,583.15-2,374.72-428.90

Finding the Fourth Proportional to 1,583.15, 2,374.72 and 428.90

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Solution

The fourth proportional to 1,583.15, 2,374.72 and 428.90 is: 643.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,583.15 : 2,374.72 = 428.90 : x
  2. Step 2: Convert to fraction form
    1,583.15/2,374.72 = 428.90/x
  3. Step 3: Cross multiply
    1,583.15x = 2,374.72 × 428.90
  4. Step 4: Simplify right side
    1,583.15x = 1,018,504.46
  5. Step 5: Solve for x
    x = 1,018,504.46/1,583.15
  6. Step 6: Final answer
    x = 643.34

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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.