Home / 991,406.31-1,368,135.95-561,685.52

Finding the Fourth Proportional to 991,406.31, 1,368,135.95 and 561,685.52

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Solution

The fourth proportional to 991,406.31, 1,368,135.95 and 561,685.52 is: 775,123.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,406.31 : 1,368,135.95 = 561,685.52 : x
  2. Step 2: Convert to fraction form
    991,406.31/1,368,135.95 = 561,685.52/x
  3. Step 3: Cross multiply
    991,406.31x = 1,368,135.95 × 561,685.52
  4. Step 4: Simplify right side
    991,406.31x = 768,462,142,857.34
  5. Step 5: Solve for x
    x = 768,462,142,857.34/991,406.31
  6. Step 6: Final answer
    x = 775,123.31

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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.