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Finding the Fourth Proportional to 830.94, 1,146.66 and 457.88

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Solution

The fourth proportional to 830.94, 1,146.66 and 457.88 is: 631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.94 : 1,146.66 = 457.88 : x
  2. Step 2: Convert to fraction form
    830.94/1,146.66 = 457.88/x
  3. Step 3: Cross multiply
    830.94x = 1,146.66 × 457.88
  4. Step 4: Simplify right side
    830.94x = 525,032.68
  5. Step 5: Solve for x
    x = 525,032.68/830.94
  6. Step 6: Final answer
    x = 631.85

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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.