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Finding the Fourth Proportional to 1,503.35, 2,074.60 and 821.98

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Solution

The fourth proportional to 1,503.35, 2,074.60 and 821.98 is: 1,134.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.35 : 2,074.60 = 821.98 : x
  2. Step 2: Convert to fraction form
    1,503.35/2,074.60 = 821.98/x
  3. Step 3: Cross multiply
    1,503.35x = 2,074.60 × 821.98
  4. Step 4: Simplify right side
    1,503.35x = 1,705,279.71
  5. Step 5: Solve for x
    x = 1,705,279.71/1,503.35
  6. Step 6: Final answer
    x = 1,134.32

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1.5x scale

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.