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Finding the Fourth Proportional to 1,075.93, 1,612.35 and 612.75

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Solution

The fourth proportional to 1,075.93, 1,612.35 and 612.75 is: 918.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.93 : 1,612.35 = 612.75 : x
  2. Step 2: Convert to fraction form
    1,075.93/1,612.35 = 612.75/x
  3. Step 3: Cross multiply
    1,075.93x = 1,612.35 × 612.75
  4. Step 4: Simplify right side
    1,075.93x = 987,962.67
  5. Step 5: Solve for x
    x = 987,962.67/1,075.93
  6. Step 6: Final answer
    x = 918.24

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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.