Home / 1,210,648.78-1,670,771.13-666,784.45

Finding the Fourth Proportional to 1,210,648.78, 1,670,771.13 and 666,784.45

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Solution

The fourth proportional to 1,210,648.78, 1,670,771.13 and 666,784.45 is: 920,204.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,648.78 : 1,670,771.13 = 666,784.45 : x
  2. Step 2: Convert to fraction form
    1,210,648.78/1,670,771.13 = 666,784.45/x
  3. Step 3: Cross multiply
    1,210,648.78x = 1,670,771.13 × 666,784.45
  4. Step 4: Simplify right side
    1,210,648.78x = 1,114,044,200,639.07
  5. Step 5: Solve for x
    x = 1,114,044,200,639.07/1,210,648.78
  6. Step 6: Final answer
    x = 920,204.29

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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.