Home / 380,905.64-525,638.40-208,817.72

Finding the Fourth Proportional to 380,905.64, 525,638.40 and 208,817.72

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Solution

The fourth proportional to 380,905.64, 525,638.40 and 208,817.72 is: 288,162.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,905.64 : 525,638.40 = 208,817.72 : x
  2. Step 2: Convert to fraction form
    380,905.64/525,638.40 = 208,817.72/x
  3. Step 3: Cross multiply
    380,905.64x = 525,638.40 × 208,817.72
  4. Step 4: Simplify right side
    380,905.64x = 109,762,611,575.40
  5. Step 5: Solve for x
    x = 109,762,611,575.40/380,905.64
  6. Step 6: Final answer
    x = 288,162.21

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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.