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Finding the Fourth Proportional to 501,980.36, 692,749.14 and 287,120.84

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Solution

The fourth proportional to 501,980.36, 692,749.14 and 287,120.84 is: 396,236.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,980.36 : 692,749.14 = 287,120.84 : x
  2. Step 2: Convert to fraction form
    501,980.36/692,749.14 = 287,120.84/x
  3. Step 3: Cross multiply
    501,980.36x = 692,749.14 × 287,120.84
  4. Step 4: Simplify right side
    501,980.36x = 198,902,714,986.08
  5. Step 5: Solve for x
    x = 198,902,714,986.08/501,980.36
  6. Step 6: Final answer
    x = 396,236.05

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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.