Home / 1,620.08-2,430.96-695.40

Finding the Fourth Proportional to 1,620.08, 2,430.96 and 695.40

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Solution

The fourth proportional to 1,620.08, 2,430.96 and 695.40 is: 1,043.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.08 : 2,430.96 = 695.40 : x
  2. Step 2: Convert to fraction form
    1,620.08/2,430.96 = 695.40/x
  3. Step 3: Cross multiply
    1,620.08x = 2,430.96 × 695.40
  4. Step 4: Simplify right side
    1,620.08x = 1,690,473.95
  5. Step 5: Solve for x
    x = 1,690,473.95/1,620.08
  6. Step 6: Final answer
    x = 1,043.45

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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.