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Finding the Fourth Proportional to 612,412.98, 845,199.81 and 340,507.86

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Solution

The fourth proportional to 612,412.98, 845,199.81 and 340,507.86 is: 469,939.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,412.98 : 845,199.81 = 340,507.86 : x
  2. Step 2: Convert to fraction form
    612,412.98/845,199.81 = 340,507.86/x
  3. Step 3: Cross multiply
    612,412.98x = 845,199.81 × 340,507.86
  4. Step 4: Simplify right side
    612,412.98x = 287,797,178,575.51
  5. Step 5: Solve for x
    x = 287,797,178,575.51/612,412.98
  6. Step 6: Final answer
    x = 469,939.71

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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.