Home / 428,794.71-643,284.95-129,250.23

Finding the Fourth Proportional to 428,794.71, 643,284.95 and 129,250.23

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Solution

The fourth proportional to 428,794.71, 643,284.95 and 129,250.23 is: 193,903.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,794.71 : 643,284.95 = 129,250.23 : x
  2. Step 2: Convert to fraction form
    428,794.71/643,284.95 = 129,250.23/x
  3. Step 3: Cross multiply
    428,794.71x = 643,284.95 × 129,250.23
  4. Step 4: Simplify right side
    428,794.71x = 83,144,727,096.79
  5. Step 5: Solve for x
    x = 83,144,727,096.79/428,794.71
  6. Step 6: Final answer
    x = 193,903.34

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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.