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Finding the Fourth Proportional to 876.04, 1,208.93 and 477.69

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Solution

The fourth proportional to 876.04, 1,208.93 and 477.69 is: 659.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.04 : 1,208.93 = 477.69 : x
  2. Step 2: Convert to fraction form
    876.04/1,208.93 = 477.69/x
  3. Step 3: Cross multiply
    876.04x = 1,208.93 × 477.69
  4. Step 4: Simplify right side
    876.04x = 577,493.77
  5. Step 5: Solve for x
    x = 577,493.77/876.04
  6. Step 6: Final answer
    x = 659.21

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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.