Home / 1,570.10-2,355.60-747.20

Finding the Fourth Proportional to 1,570.10, 2,355.60 and 747.20

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Solution

The fourth proportional to 1,570.10, 2,355.60 and 747.20 is: 1,121.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.10 : 2,355.60 = 747.20 : x
  2. Step 2: Convert to fraction form
    1,570.10/2,355.60 = 747.20/x
  3. Step 3: Cross multiply
    1,570.10x = 2,355.60 × 747.20
  4. Step 4: Simplify right side
    1,570.10x = 1,760,104.32
  5. Step 5: Solve for x
    x = 1,760,104.32/1,570.10
  6. Step 6: Final answer
    x = 1,121.01

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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.