Home / 639,971.40-959,697.90-219,030.60

Finding the Fourth Proportional to 639,971.40, 959,697.90 and 219,030.60

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Solution

The fourth proportional to 639,971.40, 959,697.90 and 219,030.60 is: 328,457.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,971.40 : 959,697.90 = 219,030.60 : x
  2. Step 2: Convert to fraction form
    639,971.40/959,697.90 = 219,030.60/x
  3. Step 3: Cross multiply
    639,971.40x = 959,697.90 × 219,030.60
  4. Step 4: Simplify right side
    639,971.40x = 210,203,206,855.74
  5. Step 5: Solve for x
    x = 210,203,206,855.74/639,971.40
  6. Step 6: Final answer
    x = 328,457.19

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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.