Home / 1,321,075.90-1,980,228.57-646,225.66

Finding the Fourth Proportional to 1,321,075.90, 1,980,228.57 and 646,225.66

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Solution

The fourth proportional to 1,321,075.90, 1,980,228.57 and 646,225.66 is: 968,660.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,075.90 : 1,980,228.57 = 646,225.66 : x
  2. Step 2: Convert to fraction form
    1,321,075.90/1,980,228.57 = 646,225.66/x
  3. Step 3: Cross multiply
    1,321,075.90x = 1,980,228.57 × 646,225.66
  4. Step 4: Simplify right side
    1,321,075.90x = 1,279,674,514,599.11
  5. Step 5: Solve for x
    x = 1,279,674,514,599.11/1,321,075.90
  6. Step 6: Final answer
    x = 968,660.86

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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.