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Finding the Fourth Proportional to 1,075.87, 1,613.79 and 345.45

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Solution

The fourth proportional to 1,075.87, 1,613.79 and 345.45 is: 518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.87 : 1,613.79 = 345.45 : x
  2. Step 2: Convert to fraction form
    1,075.87/1,613.79 = 345.45/x
  3. Step 3: Cross multiply
    1,075.87x = 1,613.79 × 345.45
  4. Step 4: Simplify right side
    1,075.87x = 557,483.76
  5. Step 5: Solve for x
    x = 557,483.76/1,075.87
  6. Step 6: Final answer
    x = 518.17

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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.