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Finding the Fourth Proportional to 1,666.77, 2,499.31 and 555.79

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Solution

The fourth proportional to 1,666.77, 2,499.31 and 555.79 is: 833.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.77 : 2,499.31 = 555.79 : x
  2. Step 2: Convert to fraction form
    1,666.77/2,499.31 = 555.79/x
  3. Step 3: Cross multiply
    1,666.77x = 2,499.31 × 555.79
  4. Step 4: Simplify right side
    1,666.77x = 1,389,083.87
  5. Step 5: Solve for x
    x = 1,389,083.87/1,666.77
  6. Step 6: Final answer
    x = 833.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.