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Finding the Fourth Proportional to 571,969.80, 858,645.90 and 319,451.40

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Solution

The fourth proportional to 571,969.80, 858,645.90 and 319,451.40 is: 479,563.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,969.80 : 858,645.90 = 319,451.40 : x
  2. Step 2: Convert to fraction form
    571,969.80/858,645.90 = 319,451.40/x
  3. Step 3: Cross multiply
    571,969.80x = 858,645.90 × 319,451.40
  4. Step 4: Simplify right side
    571,969.80x = 274,295,634,859.26
  5. Step 5: Solve for x
    x = 274,295,634,859.26/571,969.80
  6. Step 6: Final answer
    x = 479,563.14

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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.