Home / 421,145.37-581,015.75-259,720.20

Finding the Fourth Proportional to 421,145.37, 581,015.75 and 259,720.20

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Solution

The fourth proportional to 421,145.37, 581,015.75 and 259,720.20 is: 358,312.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,145.37 : 581,015.75 = 259,720.20 : x
  2. Step 2: Convert to fraction form
    421,145.37/581,015.75 = 259,720.20/x
  3. Step 3: Cross multiply
    421,145.37x = 581,015.75 × 259,720.20
  4. Step 4: Simplify right side
    421,145.37x = 150,901,525,494.55
  5. Step 5: Solve for x
    x = 150,901,525,494.55/421,145.37
  6. Step 6: Final answer
    x = 358,312.20

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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.