Home / 290,237.20-434,699.70-172,139.20

Finding the Fourth Proportional to 290,237.20, 434,699.70 and 172,139.20

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Solution

The fourth proportional to 290,237.20, 434,699.70 and 172,139.20 is: 257,819.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,237.20 : 434,699.70 = 172,139.20 : x
  2. Step 2: Convert to fraction form
    290,237.20/434,699.70 = 172,139.20/x
  3. Step 3: Cross multiply
    290,237.20x = 434,699.70 × 172,139.20
  4. Step 4: Simplify right side
    290,237.20x = 74,828,858,598.24
  5. Step 5: Solve for x
    x = 74,828,858,598.24/290,237.20
  6. Step 6: Final answer
    x = 257,819.67

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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.