Home / 4,285.64-6,430.89-1,690.40

Finding the Fourth Proportional to 4,285.64, 6,430.89 and 1,690.40

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Solution

The fourth proportional to 4,285.64, 6,430.89 and 1,690.40 is: 2,536.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,285.64 : 6,430.89 = 1,690.40 : x
  2. Step 2: Convert to fraction form
    4,285.64/6,430.89 = 1,690.40/x
  3. Step 3: Cross multiply
    4,285.64x = 6,430.89 × 1,690.40
  4. Step 4: Simplify right side
    4,285.64x = 10,870,798.87
  5. Step 5: Solve for x
    x = 10,870,798.87/4,285.64
  6. Step 6: Final answer
    x = 2,536.56

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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.