Home / 4,210.49-6,315.75-1,288.79

Finding the Fourth Proportional to 4,210.49, 6,315.75 and 1,288.79

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Solution

The fourth proportional to 4,210.49, 6,315.75 and 1,288.79 is: 1,933.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,210.49 : 6,315.75 = 1,288.79 : x
  2. Step 2: Convert to fraction form
    4,210.49/6,315.75 = 1,288.79/x
  3. Step 3: Cross multiply
    4,210.49x = 6,315.75 × 1,288.79
  4. Step 4: Simplify right side
    4,210.49x = 8,139,643.86
  5. Step 5: Solve for x
    x = 8,139,643.86/4,210.49
  6. Step 6: Final answer
    x = 1,933.18

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Double scale
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Similar ratio
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1.5x scale

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.