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Finding the Fourth Proportional to 1,315,955.70, 1,973,933.55 and 785,114.10

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Solution

The fourth proportional to 1,315,955.70, 1,973,933.55 and 785,114.10 is: 1,177,671.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,955.70 : 1,973,933.55 = 785,114.10 : x
  2. Step 2: Convert to fraction form
    1,315,955.70/1,973,933.55 = 785,114.10/x
  3. Step 3: Cross multiply
    1,315,955.70x = 1,973,933.55 × 785,114.10
  4. Step 4: Simplify right side
    1,315,955.70x = 1,549,763,062,568.06
  5. Step 5: Solve for x
    x = 1,549,763,062,568.06/1,315,955.70
  6. Step 6: Final answer
    x = 1,177,671.15

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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.