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Finding the Fourth Proportional to 612,355.20, 845,064.27 and 340,412.64

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Solution

The fourth proportional to 612,355.20, 845,064.27 and 340,412.64 is: 469,777.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,355.20 : 845,064.27 = 340,412.64 : x
  2. Step 2: Convert to fraction form
    612,355.20/845,064.27 = 340,412.64/x
  3. Step 3: Cross multiply
    612,355.20x = 845,064.27 × 340,412.64
  4. Step 4: Simplify right side
    612,355.20x = 287,670,559,120.37
  5. Step 5: Solve for x
    x = 287,670,559,120.37/612,355.20
  6. Step 6: Final answer
    x = 469,777.28

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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.