Home / 1,709.20-2,563.80-1,615.60

Finding the Fourth Proportional to 1,709.20, 2,563.80 and 1,615.60

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Solution

The fourth proportional to 1,709.20, 2,563.80 and 1,615.60 is: 2,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.20 : 2,563.80 = 1,615.60 : x
  2. Step 2: Convert to fraction form
    1,709.20/2,563.80 = 1,615.60/x
  3. Step 3: Cross multiply
    1,709.20x = 2,563.80 × 1,615.60
  4. Step 4: Simplify right side
    1,709.20x = 4,142,075.28
  5. Step 5: Solve for x
    x = 4,142,075.28/1,709.20
  6. Step 6: Final answer
    x = 2,423.40

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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.