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Finding the Fourth Proportional to 420,069.17, 579,740.41 and 256,821.47

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Solution

The fourth proportional to 420,069.17, 579,740.41 and 256,821.47 is: 354,441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,069.17 : 579,740.41 = 256,821.47 : x
  2. Step 2: Convert to fraction form
    420,069.17/579,740.41 = 256,821.47/x
  3. Step 3: Cross multiply
    420,069.17x = 579,740.41 × 256,821.47
  4. Step 4: Simplify right side
    420,069.17x = 148,889,783,910.95
  5. Step 5: Solve for x
    x = 148,889,783,910.95/420,069.17
  6. Step 6: Final answer
    x = 354,441.11

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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.