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Finding the Fourth Proportional to 1,783.40, 2,461.08 and 997.40

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Solution

The fourth proportional to 1,783.40, 2,461.08 and 997.40 is: 1,376.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.40 : 2,461.08 = 997.40 : x
  2. Step 2: Convert to fraction form
    1,783.40/2,461.08 = 997.40/x
  3. Step 3: Cross multiply
    1,783.40x = 2,461.08 × 997.40
  4. Step 4: Simplify right side
    1,783.40x = 2,454,681.19
  5. Step 5: Solve for x
    x = 2,454,681.19/1,783.40
  6. Step 6: Final answer
    x = 1,376.41

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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.