Home / 991,140.21-1,367,729.69-561,411.72

Finding the Fourth Proportional to 991,140.21, 1,367,729.69 and 561,411.72

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Solution

The fourth proportional to 991,140.21, 1,367,729.69 and 561,411.72 is: 774,723.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,140.21 : 1,367,729.69 = 561,411.72 : x
  2. Step 2: Convert to fraction form
    991,140.21/1,367,729.69 = 561,411.72/x
  3. Step 3: Cross multiply
    991,140.21x = 1,367,729.69 × 561,411.72
  4. Step 4: Simplify right side
    991,140.21x = 767,859,474,950.91
  5. Step 5: Solve for x
    x = 767,859,474,950.91/991,140.21
  6. Step 6: Final answer
    x = 774,723.36

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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.