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Finding the Fourth Proportional to 869,188.76, 1,199,476.72 and 487,215.54

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Solution

The fourth proportional to 869,188.76, 1,199,476.72 and 487,215.54 is: 672,355.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,188.76 : 1,199,476.72 = 487,215.54 : x
  2. Step 2: Convert to fraction form
    869,188.76/1,199,476.72 = 487,215.54/x
  3. Step 3: Cross multiply
    869,188.76x = 1,199,476.72 × 487,215.54
  4. Step 4: Simplify right side
    869,188.76x = 584,403,697,852.23
  5. Step 5: Solve for x
    x = 584,403,697,852.23/869,188.76
  6. Step 6: Final answer
    x = 672,355.33

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Double scale
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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.