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Finding the Fourth Proportional to 1,187.60, 1,777.35 and 1,041.80

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Solution

The fourth proportional to 1,187.60, 1,777.35 and 1,041.80 is: 1,559.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.60 : 1,777.35 = 1,041.80 : x
  2. Step 2: Convert to fraction form
    1,187.60/1,777.35 = 1,041.80/x
  3. Step 3: Cross multiply
    1,187.60x = 1,777.35 × 1,041.80
  4. Step 4: Simplify right side
    1,187.60x = 1,851,643.23
  5. Step 5: Solve for x
    x = 1,851,643.23/1,187.60
  6. Step 6: Final answer
    x = 1,559.15

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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.