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Finding the Fourth Proportional to 315,745.49, 435,729.21 and 179,779.50

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Solution

The fourth proportional to 315,745.49, 435,729.21 and 179,779.50 is: 248,095.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,745.49 : 435,729.21 = 179,779.50 : x
  2. Step 2: Convert to fraction form
    315,745.49/435,729.21 = 179,779.50/x
  3. Step 3: Cross multiply
    315,745.49x = 435,729.21 × 179,779.50
  4. Step 4: Simplify right side
    315,745.49x = 78,335,178,835.02
  5. Step 5: Solve for x
    x = 78,335,178,835.02/315,745.49
  6. Step 6: Final answer
    x = 248,095.95

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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.