Home / 286,421.21-395,209.15-165,518.18

Finding the Fourth Proportional to 286,421.21, 395,209.15 and 165,518.18

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Solution

The fourth proportional to 286,421.21, 395,209.15 and 165,518.18 is: 228,384.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,421.21 : 395,209.15 = 165,518.18 : x
  2. Step 2: Convert to fraction form
    286,421.21/395,209.15 = 165,518.18/x
  3. Step 3: Cross multiply
    286,421.21x = 395,209.15 × 165,518.18
  4. Step 4: Simplify right side
    286,421.21x = 65,414,296,837.51
  5. Step 5: Solve for x
    x = 65,414,296,837.51/286,421.21
  6. Step 6: Final answer
    x = 228,384.96

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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.