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Finding the Fourth Proportional to 612,408.79, 845,076.13 and 340,460.13

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Solution

The fourth proportional to 612,408.79, 845,076.13 and 340,460.13 is: 469,808.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,408.79 : 845,076.13 = 340,460.13 : x
  2. Step 2: Convert to fraction form
    612,408.79/845,076.13 = 340,460.13/x
  3. Step 3: Cross multiply
    612,408.79x = 845,076.13 × 340,460.13
  4. Step 4: Simplify right side
    612,408.79x = 287,714,729,079.70
  5. Step 5: Solve for x
    x = 287,714,729,079.70/612,408.79
  6. Step 6: Final answer
    x = 469,808.29

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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.