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Finding the Fourth Proportional to 561,530.60, 774,910.48 and 306,881.80

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Solution

The fourth proportional to 561,530.60, 774,910.48 and 306,881.80 is: 423,495.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,530.60 : 774,910.48 = 306,881.80 : x
  2. Step 2: Convert to fraction form
    561,530.60/774,910.48 = 306,881.80/x
  3. Step 3: Cross multiply
    561,530.60x = 774,910.48 × 306,881.80
  4. Step 4: Simplify right side
    561,530.60x = 237,805,922,941.26
  5. Step 5: Solve for x
    x = 237,805,922,941.26/561,530.60
  6. Step 6: Final answer
    x = 423,495.93

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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.