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Finding the Fourth Proportional to 1,003.45, 1,384.74 and 583.77

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Solution

The fourth proportional to 1,003.45, 1,384.74 and 583.77 is: 805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.45 : 1,384.74 = 583.77 : x
  2. Step 2: Convert to fraction form
    1,003.45/1,384.74 = 583.77/x
  3. Step 3: Cross multiply
    1,003.45x = 1,384.74 × 583.77
  4. Step 4: Simplify right side
    1,003.45x = 808,374.86
  5. Step 5: Solve for x
    x = 808,374.86/1,003.45
  6. Step 6: Final answer
    x = 805.60

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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.