Home / 1,218.98-1,830.90-945.68

Finding the Fourth Proportional to 1,218.98, 1,830.90 and 945.68

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Solution

The fourth proportional to 1,218.98, 1,830.90 and 945.68 is: 1,420.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.98 : 1,830.90 = 945.68 : x
  2. Step 2: Convert to fraction form
    1,218.98/1,830.90 = 945.68/x
  3. Step 3: Cross multiply
    1,218.98x = 1,830.90 × 945.68
  4. Step 4: Simplify right side
    1,218.98x = 1,731,445.51
  5. Step 5: Solve for x
    x = 1,731,445.51/1,218.98
  6. Step 6: Final answer
    x = 1,420.41

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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.