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Finding the Fourth Proportional to 3,605.79, 4,975.69 and 2,113.50

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Solution

The fourth proportional to 3,605.79, 4,975.69 and 2,113.50 is: 2,916.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,605.79 : 4,975.69 = 2,113.50 : x
  2. Step 2: Convert to fraction form
    3,605.79/4,975.69 = 2,113.50/x
  3. Step 3: Cross multiply
    3,605.79x = 4,975.69 × 2,113.50
  4. Step 4: Simplify right side
    3,605.79x = 10,516,120.82
  5. Step 5: Solve for x
    x = 10,516,120.82/3,605.79
  6. Step 6: Final answer
    x = 2,916.45

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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.