Home / 309,061.07-426,455.55-180,020.78

Finding the Fourth Proportional to 309,061.07, 426,455.55 and 180,020.78

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Solution

The fourth proportional to 309,061.07, 426,455.55 and 180,020.78 is: 248,400.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,061.07 : 426,455.55 = 180,020.78 : x
  2. Step 2: Convert to fraction form
    309,061.07/426,455.55 = 180,020.78/x
  3. Step 3: Cross multiply
    309,061.07x = 426,455.55 × 180,020.78
  4. Step 4: Simplify right side
    309,061.07x = 76,770,860,746.33
  5. Step 5: Solve for x
    x = 76,770,860,746.33/309,061.07
  6. Step 6: Final answer
    x = 248,400.29

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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.