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Finding the Fourth Proportional to 1,666.98, 2,300.40 and 920.92

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Solution

The fourth proportional to 1,666.98, 2,300.40 and 920.92 is: 1,270.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.98 : 2,300.40 = 920.92 : x
  2. Step 2: Convert to fraction form
    1,666.98/2,300.40 = 920.92/x
  3. Step 3: Cross multiply
    1,666.98x = 2,300.40 × 920.92
  4. Step 4: Simplify right side
    1,666.98x = 2,118,484.37
  5. Step 5: Solve for x
    x = 2,118,484.37/1,666.98
  6. Step 6: Final answer
    x = 1,270.85

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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.