Home / 430,085.20-644,544.60-287,525.20

Finding the Fourth Proportional to 430,085.20, 644,544.60 and 287,525.20

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Solution

The fourth proportional to 430,085.20, 644,544.60 and 287,525.20 is: 430,897.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,085.20 : 644,544.60 = 287,525.20 : x
  2. Step 2: Convert to fraction form
    430,085.20/644,544.60 = 287,525.20/x
  3. Step 3: Cross multiply
    430,085.20x = 644,544.60 × 287,525.20
  4. Step 4: Simplify right side
    430,085.20x = 185,322,815,023.92
  5. Step 5: Solve for x
    x = 185,322,815,023.92/430,085.20
  6. Step 6: Final answer
    x = 430,897.91

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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.