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Finding the Fourth Proportional to 2,653.60, 3,980.40 and 898.30

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Solution

The fourth proportional to 2,653.60, 3,980.40 and 898.30 is: 1,347.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,653.60 : 3,980.40 = 898.30 : x
  2. Step 2: Convert to fraction form
    2,653.60/3,980.40 = 898.30/x
  3. Step 3: Cross multiply
    2,653.60x = 3,980.40 × 898.30
  4. Step 4: Simplify right side
    2,653.60x = 3,575,593.32
  5. Step 5: Solve for x
    x = 3,575,593.32/2,653.60
  6. Step 6: Final answer
    x = 1,347.45

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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.