Home / 1,913.08-2,638.70-1,345

Finding the Fourth Proportional to 1,913.08, 2,638.70 and 1,345

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Solution

The fourth proportional to 1,913.08, 2,638.70 and 1,345 is: 1,855.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.08 : 2,638.70 = 1,345 : x
  2. Step 2: Convert to fraction form
    1,913.08/2,638.70 = 1,345/x
  3. Step 3: Cross multiply
    1,913.08x = 2,638.70 × 1,345
  4. Step 4: Simplify right side
    1,913.08x = 3,549,044.78
  5. Step 5: Solve for x
    x = 3,549,044.78/1,913.08
  6. Step 6: Final answer
    x = 1,855.15

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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.