Home / 427,981.41-641,970.57-128,460.69

Finding the Fourth Proportional to 427,981.41, 641,970.57 and 128,460.69

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Solution

The fourth proportional to 427,981.41, 641,970.57 and 128,460.69 is: 192,690.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,981.41 : 641,970.57 = 128,460.69 : x
  2. Step 2: Convert to fraction form
    427,981.41/641,970.57 = 128,460.69/x
  3. Step 3: Cross multiply
    427,981.41x = 641,970.57 × 128,460.69
  4. Step 4: Simplify right side
    427,981.41x = 82,467,982,381.89
  5. Step 5: Solve for x
    x = 82,467,982,381.89/427,981.41
  6. Step 6: Final answer
    x = 192,690.57

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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.