Home / 427,980.42-641,969.06-128,459.70

Finding the Fourth Proportional to 427,980.42, 641,969.06 and 128,459.70

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Solution

The fourth proportional to 427,980.42, 641,969.06 and 128,459.70 is: 192,689.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,980.42 : 641,969.06 = 128,459.70 : x
  2. Step 2: Convert to fraction form
    427,980.42/641,969.06 = 128,459.70/x
  3. Step 3: Cross multiply
    427,980.42x = 641,969.06 × 128,459.70
  4. Step 4: Simplify right side
    427,980.42x = 82,467,152,856.88
  5. Step 5: Solve for x
    x = 82,467,152,856.88/427,980.42
  6. Step 6: Final answer
    x = 192,689.08

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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.