Home / 1,355,985.25-1,871,123.36-812,107.11

Finding the Fourth Proportional to 1,355,985.25, 1,871,123.36 and 812,107.11

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Solution

The fourth proportional to 1,355,985.25, 1,871,123.36 and 812,107.11 is: 1,120,626.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,985.25 : 1,871,123.36 = 812,107.11 : x
  2. Step 2: Convert to fraction form
    1,355,985.25/1,871,123.36 = 812,107.11/x
  3. Step 3: Cross multiply
    1,355,985.25x = 1,871,123.36 × 812,107.11
  4. Step 4: Simplify right side
    1,355,985.25x = 1,519,552,584,343.09
  5. Step 5: Solve for x
    x = 1,519,552,584,343.09/1,355,985.25
  6. Step 6: Final answer
    x = 1,120,626.19

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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.