Home / 317,455.48-438,108.25-209,838.88

Finding the Fourth Proportional to 317,455.48, 438,108.25 and 209,838.88

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Solution

The fourth proportional to 317,455.48, 438,108.25 and 209,838.88 is: 289,590.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,455.48 : 438,108.25 = 209,838.88 : x
  2. Step 2: Convert to fraction form
    317,455.48/438,108.25 = 209,838.88/x
  3. Step 3: Cross multiply
    317,455.48x = 438,108.25 × 209,838.88
  4. Step 4: Simplify right side
    317,455.48x = 91,932,142,878.89
  5. Step 5: Solve for x
    x = 91,932,142,878.89/317,455.48
  6. Step 6: Final answer
    x = 289,590.67

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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.