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Finding the Fourth Proportional to 1,870.60, 2,615.60 and 1,870.60

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Solution

The fourth proportional to 1,870.60, 2,615.60 and 1,870.60 is: 2,615.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,870.60 : 2,615.60 = 1,870.60 : x
  2. Step 2: Convert to fraction form
    1,870.60/2,615.60 = 1,870.60/x
  3. Step 3: Cross multiply
    1,870.60x = 2,615.60 × 1,870.60
  4. Step 4: Simplify right side
    1,870.60x = 4,892,741.36
  5. Step 5: Solve for x
    x = 4,892,741.36/1,870.60
  6. Step 6: Final answer
    x = 2,615.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.