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Finding the Fourth Proportional to 1,208.02, 1,667.45 and 710.86

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Solution

The fourth proportional to 1,208.02, 1,667.45 and 710.86 is: 981.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.02 : 1,667.45 = 710.86 : x
  2. Step 2: Convert to fraction form
    1,208.02/1,667.45 = 710.86/x
  3. Step 3: Cross multiply
    1,208.02x = 1,667.45 × 710.86
  4. Step 4: Simplify right side
    1,208.02x = 1,185,323.51
  5. Step 5: Solve for x
    x = 1,185,323.51/1,208.02
  6. Step 6: Final answer
    x = 981.21

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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.