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Finding the Fourth Proportional to 830.79, 1,243.54 and 464.46

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Solution

The fourth proportional to 830.79, 1,243.54 and 464.46 is: 695.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.79 : 1,243.54 = 464.46 : x
  2. Step 2: Convert to fraction form
    830.79/1,243.54 = 464.46/x
  3. Step 3: Cross multiply
    830.79x = 1,243.54 × 464.46
  4. Step 4: Simplify right side
    830.79x = 577,574.59
  5. Step 5: Solve for x
    x = 577,574.59/830.79
  6. Step 6: Final answer
    x = 695.21

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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.