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Finding the Fourth Proportional to 571,008.40, 855,693.40 and 420,070.80

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Solution

The fourth proportional to 571,008.40, 855,693.40 and 420,070.80 is: 629,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,008.40 : 855,693.40 = 420,070.80 : x
  2. Step 2: Convert to fraction form
    571,008.40/855,693.40 = 420,070.80/x
  3. Step 3: Cross multiply
    571,008.40x = 855,693.40 × 420,070.80
  4. Step 4: Simplify right side
    571,008.40x = 359,451,811,092.72
  5. Step 5: Solve for x
    x = 359,451,811,092.72/571,008.40
  6. Step 6: Final answer
    x = 629,503.54

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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.