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Finding the Fourth Proportional to 830.03, 1,245.05 and 310.01

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Solution

The fourth proportional to 830.03, 1,245.05 and 310.01 is: 465.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.03 : 1,245.05 = 310.01 : x
  2. Step 2: Convert to fraction form
    830.03/1,245.05 = 310.01/x
  3. Step 3: Cross multiply
    830.03x = 1,245.05 × 310.01
  4. Step 4: Simplify right side
    830.03x = 385,977.95
  5. Step 5: Solve for x
    x = 385,977.95/830.03
  6. Step 6: Final answer
    x = 465.02

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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.