Home / 318,800.49-439,196.37-221,837.60

Finding the Fourth Proportional to 318,800.49, 439,196.37 and 221,837.60

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Solution

The fourth proportional to 318,800.49, 439,196.37 and 221,837.60 is: 305,615.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,800.49 : 439,196.37 = 221,837.60 : x
  2. Step 2: Convert to fraction form
    318,800.49/439,196.37 = 221,837.60/x
  3. Step 3: Cross multiply
    318,800.49x = 439,196.37 × 221,837.60
  4. Step 4: Simplify right side
    318,800.49x = 97,430,268,649.51
  5. Step 5: Solve for x
    x = 97,430,268,649.51/318,800.49
  6. Step 6: Final answer
    x = 305,615.18

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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.