Home / 991,131.09-1,367,717.09-561,402.60

Finding the Fourth Proportional to 991,131.09, 1,367,717.09 and 561,402.60

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Solution

The fourth proportional to 991,131.09, 1,367,717.09 and 561,402.60 is: 774,710.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,131.09 : 1,367,717.09 = 561,402.60 : x
  2. Step 2: Convert to fraction form
    991,131.09/1,367,717.09 = 561,402.60/x
  3. Step 3: Cross multiply
    991,131.09x = 1,367,717.09 × 561,402.60
  4. Step 4: Simplify right side
    991,131.09x = 767,839,930,390.43
  5. Step 5: Solve for x
    x = 767,839,930,390.43/991,131.09
  6. Step 6: Final answer
    x = 774,710.77

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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.