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Finding the Fourth Proportional to 4,700.65, 6,486.90 and 2,812.31

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Solution

The fourth proportional to 4,700.65, 6,486.90 and 2,812.31 is: 3,880.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,700.65 : 6,486.90 = 2,812.31 : x
  2. Step 2: Convert to fraction form
    4,700.65/6,486.90 = 2,812.31/x
  3. Step 3: Cross multiply
    4,700.65x = 6,486.90 × 2,812.31
  4. Step 4: Simplify right side
    4,700.65x = 18,243,173.74
  5. Step 5: Solve for x
    x = 18,243,173.74/4,700.65
  6. Step 6: Final answer
    x = 3,880.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.