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Finding the Fourth Proportional to 2,505.55, 3,457.55 and 1,386.51

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Solution

The fourth proportional to 2,505.55, 3,457.55 and 1,386.51 is: 1,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.55 : 3,457.55 = 1,386.51 : x
  2. Step 2: Convert to fraction form
    2,505.55/3,457.55 = 1,386.51/x
  3. Step 3: Cross multiply
    2,505.55x = 3,457.55 × 1,386.51
  4. Step 4: Simplify right side
    2,505.55x = 4,793,927.65
  5. Step 5: Solve for x
    x = 4,793,927.65/2,505.55
  6. Step 6: Final answer
    x = 1,913.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.