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Finding the Fourth Proportional to 4,985.79, 7,478.73 and 1,698.81

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Solution

The fourth proportional to 4,985.79, 7,478.73 and 1,698.81 is: 2,548.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.79 : 7,478.73 = 1,698.81 : x
  2. Step 2: Convert to fraction form
    4,985.79/7,478.73 = 1,698.81/x
  3. Step 3: Cross multiply
    4,985.79x = 7,478.73 × 1,698.81
  4. Step 4: Simplify right side
    4,985.79x = 12,704,913.27
  5. Step 5: Solve for x
    x = 12,704,913.27/4,985.79
  6. Step 6: Final answer
    x = 2,548.23

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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.