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Finding the Fourth Proportional to 1,405.19, 2,108.19 and 583.31

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Solution

The fourth proportional to 1,405.19, 2,108.19 and 583.31 is: 875.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.19 : 2,108.19 = 583.31 : x
  2. Step 2: Convert to fraction form
    1,405.19/2,108.19 = 583.31/x
  3. Step 3: Cross multiply
    1,405.19x = 2,108.19 × 583.31
  4. Step 4: Simplify right side
    1,405.19x = 1,229,728.31
  5. Step 5: Solve for x
    x = 1,229,728.31/1,405.19
  6. Step 6: Final answer
    x = 875.13

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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.