Home / 991,190.95-1,367,871.54-561,470.95

Finding the Fourth Proportional to 991,190.95, 1,367,871.54 and 561,470.95

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Solution

The fourth proportional to 991,190.95, 1,367,871.54 and 561,470.95 is: 774,845.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,190.95 : 1,367,871.54 = 561,470.95 : x
  2. Step 2: Convert to fraction form
    991,190.95/1,367,871.54 = 561,470.95/x
  3. Step 3: Cross multiply
    991,190.95x = 1,367,871.54 × 561,470.95
  4. Step 4: Simplify right side
    991,190.95x = 768,020,133,041.76
  5. Step 5: Solve for x
    x = 768,020,133,041.76/991,190.95
  6. Step 6: Final answer
    x = 774,845.79

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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.