Home / 1,875.20-2,812.80-1,529.60

Finding the Fourth Proportional to 1,875.20, 2,812.80 and 1,529.60

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Solution

The fourth proportional to 1,875.20, 2,812.80 and 1,529.60 is: 2,294.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.20 : 2,812.80 = 1,529.60 : x
  2. Step 2: Convert to fraction form
    1,875.20/2,812.80 = 1,529.60/x
  3. Step 3: Cross multiply
    1,875.20x = 2,812.80 × 1,529.60
  4. Step 4: Simplify right side
    1,875.20x = 4,302,458.88
  5. Step 5: Solve for x
    x = 4,302,458.88/1,875.20
  6. Step 6: Final answer
    x = 2,294.40

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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.