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Finding the Fourth Proportional to 1,390.08, 2,084.28 and 695.94

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Solution

The fourth proportional to 1,390.08, 2,084.28 and 695.94 is: 1,043.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.08 : 2,084.28 = 695.94 : x
  2. Step 2: Convert to fraction form
    1,390.08/2,084.28 = 695.94/x
  3. Step 3: Cross multiply
    1,390.08x = 2,084.28 × 695.94
  4. Step 4: Simplify right side
    1,390.08x = 1,450,533.82
  5. Step 5: Solve for x
    x = 1,450,533.82/1,390.08
  6. Step 6: Final answer
    x = 1,043.49

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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.