Home / 639,247.71-958,197.42-212,669.28

Finding the Fourth Proportional to 639,247.71, 958,197.42 and 212,669.28

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Solution

The fourth proportional to 639,247.71, 958,197.42 and 212,669.28 is: 318,779.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,247.71 : 958,197.42 = 212,669.28 : x
  2. Step 2: Convert to fraction form
    639,247.71/958,197.42 = 212,669.28/x
  3. Step 3: Cross multiply
    639,247.71x = 958,197.42 × 212,669.28
  4. Step 4: Simplify right side
    639,247.71x = 203,779,155,409.26
  5. Step 5: Solve for x
    x = 203,779,155,409.26/639,247.71
  6. Step 6: Final answer
    x = 318,779.64

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1.5x scale

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.