Home / 1,665.70-2,298.64-919.66

Finding the Fourth Proportional to 1,665.70, 2,298.64 and 919.66

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Solution

The fourth proportional to 1,665.70, 2,298.64 and 919.66 is: 1,269.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.70 : 2,298.64 = 919.66 : x
  2. Step 2: Convert to fraction form
    1,665.70/2,298.64 = 919.66/x
  3. Step 3: Cross multiply
    1,665.70x = 2,298.64 × 919.66
  4. Step 4: Simplify right side
    1,665.70x = 2,113,967.26
  5. Step 5: Solve for x
    x = 2,113,967.26/1,665.70
  6. Step 6: Final answer
    x = 1,269.12

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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.