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Finding the Fourth Proportional to 830.49, 1,145.99 and 457.46

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Solution

The fourth proportional to 830.49, 1,145.99 and 457.46 is: 631.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.49 : 1,145.99 = 457.46 : x
  2. Step 2: Convert to fraction form
    830.49/1,145.99 = 457.46/x
  3. Step 3: Cross multiply
    830.49x = 1,145.99 × 457.46
  4. Step 4: Simplify right side
    830.49x = 524,244.59
  5. Step 5: Solve for x
    x = 524,244.59/830.49
  6. Step 6: Final answer
    x = 631.25

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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.