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Finding the Fourth Proportional to 1,315.60, 1,968.53 and 1,054.80

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Solution

The fourth proportional to 1,315.60, 1,968.53 and 1,054.80 is: 1,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.60 : 1,968.53 = 1,054.80 : x
  2. Step 2: Convert to fraction form
    1,315.60/1,968.53 = 1,054.80/x
  3. Step 3: Cross multiply
    1,315.60x = 1,968.53 × 1,054.80
  4. Step 4: Simplify right side
    1,315.60x = 2,076,400.17
  5. Step 5: Solve for x
    x = 2,076,400.17/1,315.60
  6. Step 6: Final answer
    x = 1,578.29

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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.