Home / 1,971,153.38-2,720,186.58-1,099,978.79

Finding the Fourth Proportional to 1,971,153.38, 2,720,186.58 and 1,099,978.79

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Solution

The fourth proportional to 1,971,153.38, 2,720,186.58 and 1,099,978.79 is: 1,517,967.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971,153.38 : 2,720,186.58 = 1,099,978.79 : x
  2. Step 2: Convert to fraction form
    1,971,153.38/2,720,186.58 = 1,099,978.79/x
  3. Step 3: Cross multiply
    1,971,153.38x = 2,720,186.58 × 1,099,978.79
  4. Step 4: Simplify right side
    1,971,153.38x = 2,992,147,549,643.10
  5. Step 5: Solve for x
    x = 2,992,147,549,643.10/1,971,153.38
  6. Step 6: Final answer
    x = 1,517,967.89

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Double scale
Find fourth proportional to 1,971,154.38, 2,720,187.96 and 1,099,979.79
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1.5x scale

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.