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Finding the Fourth Proportional to 1,903.08, 2,625.12 and 1,407

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Solution

The fourth proportional to 1,903.08, 2,625.12 and 1,407 is: 1,940.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.08 : 2,625.12 = 1,407 : x
  2. Step 2: Convert to fraction form
    1,903.08/2,625.12 = 1,407/x
  3. Step 3: Cross multiply
    1,903.08x = 2,625.12 × 1,407
  4. Step 4: Simplify right side
    1,903.08x = 3,693,543.84
  5. Step 5: Solve for x
    x = 3,693,543.84/1,903.08
  6. Step 6: Final answer
    x = 1,940.82

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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.