Home / 685,745.40-1,029,201.30-307,248.60

Finding the Fourth Proportional to 685,745.40, 1,029,201.30 and 307,248.60

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Solution

The fourth proportional to 685,745.40, 1,029,201.30 and 307,248.60 is: 461,134.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,745.40 : 1,029,201.30 = 307,248.60 : x
  2. Step 2: Convert to fraction form
    685,745.40/1,029,201.30 = 307,248.60/x
  3. Step 3: Cross multiply
    685,745.40x = 1,029,201.30 × 307,248.60
  4. Step 4: Simplify right side
    685,745.40x = 316,220,658,543.18
  5. Step 5: Solve for x
    x = 316,220,658,543.18/685,745.40
  6. Step 6: Final answer
    x = 461,134.20

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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.