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Finding the Fourth Proportional to 1,369.80, 2,054.70 and 503.76

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Solution

The fourth proportional to 1,369.80, 2,054.70 and 503.76 is: 755.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.80 : 2,054.70 = 503.76 : x
  2. Step 2: Convert to fraction form
    1,369.80/2,054.70 = 503.76/x
  3. Step 3: Cross multiply
    1,369.80x = 2,054.70 × 503.76
  4. Step 4: Simplify right side
    1,369.80x = 1,035,075.67
  5. Step 5: Solve for x
    x = 1,035,075.67/1,369.80
  6. Step 6: Final answer
    x = 755.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.