Home / 1,897.90-2,618.53-1,111.79

Finding the Fourth Proportional to 1,897.90, 2,618.53 and 1,111.79

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Solution

The fourth proportional to 1,897.90, 2,618.53 and 1,111.79 is: 1,533.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,897.90 : 2,618.53 = 1,111.79 : x
  2. Step 2: Convert to fraction form
    1,897.90/2,618.53 = 1,111.79/x
  3. Step 3: Cross multiply
    1,897.90x = 2,618.53 × 1,111.79
  4. Step 4: Simplify right side
    1,897.90x = 2,911,259.24
  5. Step 5: Solve for x
    x = 2,911,259.24/1,897.90
  6. Step 6: Final answer
    x = 1,533.94

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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.