Home / 990,871.41-1,367,356.78-561,154.63

Finding the Fourth Proportional to 990,871.41, 1,367,356.78 and 561,154.63

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Solution

The fourth proportional to 990,871.41, 1,367,356.78 and 561,154.63 is: 774,367.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,871.41 : 1,367,356.78 = 561,154.63 : x
  2. Step 2: Convert to fraction form
    990,871.41/1,367,356.78 = 561,154.63/x
  3. Step 3: Cross multiply
    990,871.41x = 1,367,356.78 × 561,154.63
  4. Step 4: Simplify right side
    990,871.41x = 767,298,585,153.12
  5. Step 5: Solve for x
    x = 767,298,585,153.12/990,871.41
  6. Step 6: Final answer
    x = 774,367.47

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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.