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Finding the Fourth Proportional to 612,388.15, 845,047.78 and 340,439.49

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Solution

The fourth proportional to 612,388.15, 845,047.78 and 340,439.49 is: 469,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,388.15 : 845,047.78 = 340,439.49 : x
  2. Step 2: Convert to fraction form
    612,388.15/845,047.78 = 340,439.49/x
  3. Step 3: Cross multiply
    612,388.15x = 845,047.78 × 340,439.49
  4. Step 4: Simplify right side
    612,388.15x = 287,687,635,248.83
  5. Step 5: Solve for x
    x = 287,687,635,248.83/612,388.15
  6. Step 6: Final answer
    x = 469,779.89

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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.