Home / 2,985.16-4,478.64-1,205.30

Finding the Fourth Proportional to 2,985.16, 4,478.64 and 1,205.30

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Solution

The fourth proportional to 2,985.16, 4,478.64 and 1,205.30 is: 1,808.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.16 : 4,478.64 = 1,205.30 : x
  2. Step 2: Convert to fraction form
    2,985.16/4,478.64 = 1,205.30/x
  3. Step 3: Cross multiply
    2,985.16x = 4,478.64 × 1,205.30
  4. Step 4: Simplify right side
    2,985.16x = 5,398,115.99
  5. Step 5: Solve for x
    x = 5,398,115.99/2,985.16
  6. Step 6: Final answer
    x = 1,808.32

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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.