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Finding the Fourth Proportional to 1,666.25, 2,299.43 and 930.25

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Solution

The fourth proportional to 1,666.25, 2,299.43 and 930.25 is: 1,283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.25 : 2,299.43 = 930.25 : x
  2. Step 2: Convert to fraction form
    1,666.25/2,299.43 = 930.25/x
  3. Step 3: Cross multiply
    1,666.25x = 2,299.43 × 930.25
  4. Step 4: Simplify right side
    1,666.25x = 2,139,044.76
  5. Step 5: Solve for x
    x = 2,139,044.76/1,666.25
  6. Step 6: Final answer
    x = 1,283.75

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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.