Home / 1,688.32-2,330.04-1,216.36

Finding the Fourth Proportional to 1,688.32, 2,330.04 and 1,216.36

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Solution

The fourth proportional to 1,688.32, 2,330.04 and 1,216.36 is: 1,678.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.32 : 2,330.04 = 1,216.36 : x
  2. Step 2: Convert to fraction form
    1,688.32/2,330.04 = 1,216.36/x
  3. Step 3: Cross multiply
    1,688.32x = 2,330.04 × 1,216.36
  4. Step 4: Simplify right side
    1,688.32x = 2,834,167.45
  5. Step 5: Solve for x
    x = 2,834,167.45/1,688.32
  6. Step 6: Final answer
    x = 1,678.69

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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.