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Finding the Fourth Proportional to 4,913.20, 7,369.80 and 4,718.80

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Solution

The fourth proportional to 4,913.20, 7,369.80 and 4,718.80 is: 7,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,913.20 : 7,369.80 = 4,718.80 : x
  2. Step 2: Convert to fraction form
    4,913.20/7,369.80 = 4,718.80/x
  3. Step 3: Cross multiply
    4,913.20x = 7,369.80 × 4,718.80
  4. Step 4: Simplify right side
    4,913.20x = 34,776,612.24
  5. Step 5: Solve for x
    x = 34,776,612.24/4,913.20
  6. Step 6: Final answer
    x = 7,078.20

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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.