Home / 991,119.60-1,390,366.80-991,119.60

Finding the Fourth Proportional to 991,119.60, 1,390,366.80 and 991,119.60

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Solution

The fourth proportional to 991,119.60, 1,390,366.80 and 991,119.60 is: 1,390,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,119.60 : 1,390,366.80 = 991,119.60 : x
  2. Step 2: Convert to fraction form
    991,119.60/1,390,366.80 = 991,119.60/x
  3. Step 3: Cross multiply
    991,119.60x = 1,390,366.80 × 991,119.60
  4. Step 4: Simplify right side
    991,119.60x = 1,378,019,786,669.28
  5. Step 5: Solve for x
    x = 1,378,019,786,669.28/991,119.60
  6. Step 6: Final answer
    x = 1,390,366.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.