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Finding the Fourth Proportional to 1,316,412.20, 1,971,119.10 and 1,316,412.20

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Solution

The fourth proportional to 1,316,412.20, 1,971,119.10 and 1,316,412.20 is: 1,971,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316,412.20 : 1,971,119.10 = 1,316,412.20 : x
  2. Step 2: Convert to fraction form
    1,316,412.20/1,971,119.10 = 1,316,412.20/x
  3. Step 3: Cross multiply
    1,316,412.20x = 1,971,119.10 × 1,316,412.20
  4. Step 4: Simplify right side
    1,316,412.20x = 2,594,805,230,893.02
  5. Step 5: Solve for x
    x = 2,594,805,230,893.02/1,316,412.20
  6. Step 6: Final answer
    x = 1,971,119.10

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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.