Home / 1,210,642.75-1,670,762.84-666,778.42

Finding the Fourth Proportional to 1,210,642.75, 1,670,762.84 and 666,778.42

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Solution

The fourth proportional to 1,210,642.75, 1,670,762.84 and 666,778.42 is: 920,195.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,642.75 : 1,670,762.84 = 666,778.42 : x
  2. Step 2: Convert to fraction form
    1,210,642.75/1,670,762.84 = 666,778.42/x
  3. Step 3: Cross multiply
    1,210,642.75x = 1,670,762.84 × 666,778.42
  4. Step 4: Simplify right side
    1,210,642.75x = 1,114,028,606,649.91
  5. Step 5: Solve for x
    x = 1,114,028,606,649.91/1,210,642.75
  6. Step 6: Final answer
    x = 920,195.99

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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.