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Finding the Fourth Proportional to 1,392.83, 2,088.32 and 559.34

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Solution

The fourth proportional to 1,392.83, 2,088.32 and 559.34 is: 838.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.83 : 2,088.32 = 559.34 : x
  2. Step 2: Convert to fraction form
    1,392.83/2,088.32 = 559.34/x
  3. Step 3: Cross multiply
    1,392.83x = 2,088.32 × 559.34
  4. Step 4: Simplify right side
    1,392.83x = 1,168,070.47
  5. Step 5: Solve for x
    x = 1,168,070.47/1,392.83
  6. Step 6: Final answer
    x = 838.63

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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.