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Finding the Fourth Proportional to 875.90, 1,208.74 and 482.95

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Solution

The fourth proportional to 875.90, 1,208.74 and 482.95 is: 666.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.90 : 1,208.74 = 482.95 : x
  2. Step 2: Convert to fraction form
    875.90/1,208.74 = 482.95/x
  3. Step 3: Cross multiply
    875.90x = 1,208.74 × 482.95
  4. Step 4: Simplify right side
    875.90x = 583,759.17
  5. Step 5: Solve for x
    x = 583,759.17/875.90
  6. Step 6: Final answer
    x = 666.47

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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.