Home / 1,312.14-1,969.56-619.35

Finding the Fourth Proportional to 1,312.14, 1,969.56 and 619.35

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Solution

The fourth proportional to 1,312.14, 1,969.56 and 619.35 is: 929.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.14 : 1,969.56 = 619.35 : x
  2. Step 2: Convert to fraction form
    1,312.14/1,969.56 = 619.35/x
  3. Step 3: Cross multiply
    1,312.14x = 1,969.56 × 619.35
  4. Step 4: Simplify right side
    1,312.14x = 1,219,846.99
  5. Step 5: Solve for x
    x = 1,219,846.99/1,312.14
  6. Step 6: Final answer
    x = 929.66

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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.