Home / 1,683.16-2,520-1,188.40

Finding the Fourth Proportional to 1,683.16, 2,520 and 1,188.40

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Solution

The fourth proportional to 1,683.16, 2,520 and 1,188.40 is: 1,779.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,683.16 : 2,520 = 1,188.40 : x
  2. Step 2: Convert to fraction form
    1,683.16/2,520 = 1,188.40/x
  3. Step 3: Cross multiply
    1,683.16x = 2,520 × 1,188.40
  4. Step 4: Simplify right side
    1,683.16x = 2,994,768
  5. Step 5: Solve for x
    x = 2,994,768/1,683.16
  6. Step 6: Final answer
    x = 1,779.25

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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.