Home / 1,561.30-2,155.65-1,394.98

Finding the Fourth Proportional to 1,561.30, 2,155.65 and 1,394.98

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Solution

The fourth proportional to 1,561.30, 2,155.65 and 1,394.98 is: 1,926.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.30 : 2,155.65 = 1,394.98 : x
  2. Step 2: Convert to fraction form
    1,561.30/2,155.65 = 1,394.98/x
  3. Step 3: Cross multiply
    1,561.30x = 2,155.65 × 1,394.98
  4. Step 4: Simplify right side
    1,561.30x = 3,007,088.64
  5. Step 5: Solve for x
    x = 3,007,088.64/1,561.30
  6. Step 6: Final answer
    x = 1,926.02

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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.