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Finding the Fourth Proportional to 426,244.80, 639,712.80 and 412,420.80

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Solution

The fourth proportional to 426,244.80, 639,712.80 and 412,420.80 is: 618,965.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,244.80 : 639,712.80 = 412,420.80 : x
  2. Step 2: Convert to fraction form
    426,244.80/639,712.80 = 412,420.80/x
  3. Step 3: Cross multiply
    426,244.80x = 639,712.80 × 412,420.80
  4. Step 4: Simplify right side
    426,244.80x = 263,830,864,746.24
  5. Step 5: Solve for x
    x = 263,830,864,746.24/426,244.80
  6. Step 6: Final answer
    x = 618,965.59

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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.