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Finding the Fourth Proportional to 287,466.71, 393,830.80 and 276,692.48

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Solution

The fourth proportional to 287,466.71, 393,830.80 and 276,692.48 is: 379,070.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,466.71 : 393,830.80 = 276,692.48 : x
  2. Step 2: Convert to fraction form
    287,466.71/393,830.80 = 276,692.48/x
  3. Step 3: Cross multiply
    287,466.71x = 393,830.80 × 276,692.48
  4. Step 4: Simplify right side
    287,466.71x = 108,970,020,752.38
  5. Step 5: Solve for x
    x = 108,970,020,752.38/287,466.71
  6. Step 6: Final answer
    x = 379,070.05

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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.