Home / 1,430.20-2,145.46-456.08

Finding the Fourth Proportional to 1,430.20, 2,145.46 and 456.08

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Solution

The fourth proportional to 1,430.20, 2,145.46 and 456.08 is: 684.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.20 : 2,145.46 = 456.08 : x
  2. Step 2: Convert to fraction form
    1,430.20/2,145.46 = 456.08/x
  3. Step 3: Cross multiply
    1,430.20x = 2,145.46 × 456.08
  4. Step 4: Simplify right side
    1,430.20x = 978,501.40
  5. Step 5: Solve for x
    x = 978,501.40/1,430.20
  6. Step 6: Final answer
    x = 684.17

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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.