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Finding the Fourth Proportional to 710.10, 980.55 and 448.58

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Solution

The fourth proportional to 710.10, 980.55 and 448.58 is: 619.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.10 : 980.55 = 448.58 : x
  2. Step 2: Convert to fraction form
    710.10/980.55 = 448.58/x
  3. Step 3: Cross multiply
    710.10x = 980.55 × 448.58
  4. Step 4: Simplify right side
    710.10x = 439,855.12
  5. Step 5: Solve for x
    x = 439,855.12/710.10
  6. Step 6: Final answer
    x = 619.43

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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.