Home / 557,555.86-769,379.28-309,205.78

Finding the Fourth Proportional to 557,555.86, 769,379.28 and 309,205.78

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Solution

The fourth proportional to 557,555.86, 769,379.28 and 309,205.78 is: 426,677.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,555.86 : 769,379.28 = 309,205.78 : x
  2. Step 2: Convert to fraction form
    557,555.86/769,379.28 = 309,205.78/x
  3. Step 3: Cross multiply
    557,555.86x = 769,379.28 × 309,205.78
  4. Step 4: Simplify right side
    557,555.86x = 237,896,520,388.24
  5. Step 5: Solve for x
    x = 237,896,520,388.24/557,555.86
  6. Step 6: Final answer
    x = 426,677.46

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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.