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Finding the Fourth Proportional to 1,054.55, 1,455.16 and 612.36

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Solution

The fourth proportional to 1,054.55, 1,455.16 and 612.36 is: 844.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.55 : 1,455.16 = 612.36 : x
  2. Step 2: Convert to fraction form
    1,054.55/1,455.16 = 612.36/x
  3. Step 3: Cross multiply
    1,054.55x = 1,455.16 × 612.36
  4. Step 4: Simplify right side
    1,054.55x = 891,081.78
  5. Step 5: Solve for x
    x = 891,081.78/1,054.55
  6. Step 6: Final answer
    x = 844.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.