Home / 1,490.10-2,235.15-1,392.90

Finding the Fourth Proportional to 1,490.10, 2,235.15 and 1,392.90

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Solution

The fourth proportional to 1,490.10, 2,235.15 and 1,392.90 is: 2,089.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.10 : 2,235.15 = 1,392.90 : x
  2. Step 2: Convert to fraction form
    1,490.10/2,235.15 = 1,392.90/x
  3. Step 3: Cross multiply
    1,490.10x = 2,235.15 × 1,392.90
  4. Step 4: Simplify right side
    1,490.10x = 3,113,340.44
  5. Step 5: Solve for x
    x = 3,113,340.44/1,490.10
  6. Step 6: Final answer
    x = 2,089.35

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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.