Home / 1,583.16-2,374.74-428.88

Finding the Fourth Proportional to 1,583.16, 2,374.74 and 428.88

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Solution

The fourth proportional to 1,583.16, 2,374.74 and 428.88 is: 643.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,583.16 : 2,374.74 = 428.88 : x
  2. Step 2: Convert to fraction form
    1,583.16/2,374.74 = 428.88/x
  3. Step 3: Cross multiply
    1,583.16x = 2,374.74 × 428.88
  4. Step 4: Simplify right side
    1,583.16x = 1,018,478.49
  5. Step 5: Solve for x
    x = 1,018,478.49/1,583.16
  6. Step 6: Final answer
    x = 643.32

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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.