Home / 2,807.20-4,210.80-1,345.60

Finding the Fourth Proportional to 2,807.20, 4,210.80 and 1,345.60

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Solution

The fourth proportional to 2,807.20, 4,210.80 and 1,345.60 is: 2,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.20 : 4,210.80 = 1,345.60 : x
  2. Step 2: Convert to fraction form
    2,807.20/4,210.80 = 1,345.60/x
  3. Step 3: Cross multiply
    2,807.20x = 4,210.80 × 1,345.60
  4. Step 4: Simplify right side
    2,807.20x = 5,666,052.48
  5. Step 5: Solve for x
    x = 5,666,052.48/2,807.20
  6. Step 6: Final answer
    x = 2,018.40

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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.