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Finding the Fourth Proportional to 1,409.45, 2,113.47 and 435.43

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Solution

The fourth proportional to 1,409.45, 2,113.47 and 435.43 is: 652.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.45 : 2,113.47 = 435.43 : x
  2. Step 2: Convert to fraction form
    1,409.45/2,113.47 = 435.43/x
  3. Step 3: Cross multiply
    1,409.45x = 2,113.47 × 435.43
  4. Step 4: Simplify right side
    1,409.45x = 920,268.24
  5. Step 5: Solve for x
    x = 920,268.24/1,409.45
  6. Step 6: Final answer
    x = 652.93

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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.