Home / 1,222,218.34-1,686,740.12-678,354.16

Finding the Fourth Proportional to 1,222,218.34, 1,686,740.12 and 678,354.16

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Solution

The fourth proportional to 1,222,218.34, 1,686,740.12 and 678,354.16 is: 936,172.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,218.34 : 1,686,740.12 = 678,354.16 : x
  2. Step 2: Convert to fraction form
    1,222,218.34/1,686,740.12 = 678,354.16/x
  3. Step 3: Cross multiply
    1,222,218.34x = 1,686,740.12 × 678,354.16
  4. Step 4: Simplify right side
    1,222,218.34x = 1,144,207,177,240.90
  5. Step 5: Solve for x
    x = 1,144,207,177,240.90/1,222,218.34
  6. Step 6: Final answer
    x = 936,172.48

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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.