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Finding the Fourth Proportional to 1,055.15, 1,456.10 and 583.08

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Solution

The fourth proportional to 1,055.15, 1,456.10 and 583.08 is: 804.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.15 : 1,456.10 = 583.08 : x
  2. Step 2: Convert to fraction form
    1,055.15/1,456.10 = 583.08/x
  3. Step 3: Cross multiply
    1,055.15x = 1,456.10 × 583.08
  4. Step 4: Simplify right side
    1,055.15x = 849,015.51
  5. Step 5: Solve for x
    x = 849,015.51/1,055.15
  6. Step 6: Final answer
    x = 804.64

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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.