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Finding the Fourth Proportional to 1,807.11, 2,710.86 and 986.58

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Solution

The fourth proportional to 1,807.11, 2,710.86 and 986.58 is: 1,479.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,807.11 : 2,710.86 = 986.58 : x
  2. Step 2: Convert to fraction form
    1,807.11/2,710.86 = 986.58/x
  3. Step 3: Cross multiply
    1,807.11x = 2,710.86 × 986.58
  4. Step 4: Simplify right side
    1,807.11x = 2,674,480.26
  5. Step 5: Solve for x
    x = 2,674,480.26/1,807.11
  6. Step 6: Final answer
    x = 1,479.98

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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.