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Finding the Fourth Proportional to 612,205.60, 918,745.80 and 257,474.20

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Solution

The fourth proportional to 612,205.60, 918,745.80 and 257,474.20 is: 386,395.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,205.60 : 918,745.80 = 257,474.20 : x
  2. Step 2: Convert to fraction form
    612,205.60/918,745.80 = 257,474.20/x
  3. Step 3: Cross multiply
    612,205.60x = 918,745.80 × 257,474.20
  4. Step 4: Simplify right side
    612,205.60x = 236,553,339,858.36
  5. Step 5: Solve for x
    x = 236,553,339,858.36/612,205.60
  6. Step 6: Final answer
    x = 386,395.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.