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Finding the Fourth Proportional to 287,470.95, 393,836.63 and 276,696.74

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Solution

The fourth proportional to 287,470.95, 393,836.63 and 276,696.74 is: 379,075.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,470.95 : 393,836.63 = 276,696.74 : x
  2. Step 2: Convert to fraction form
    287,470.95/393,836.63 = 276,696.74/x
  3. Step 3: Cross multiply
    287,470.95x = 393,836.63 × 276,696.74
  4. Step 4: Simplify right side
    287,470.95x = 108,973,311,613.59
  5. Step 5: Solve for x
    x = 108,973,311,613.59/287,470.95
  6. Step 6: Final answer
    x = 379,075.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.