Home / 319,071.48-440,011.62-209,980.68

Finding the Fourth Proportional to 319,071.48, 440,011.62 and 209,980.68

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Solution

The fourth proportional to 319,071.48, 440,011.62 and 209,980.68 is: 289,571.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,071.48 : 440,011.62 = 209,980.68 : x
  2. Step 2: Convert to fraction form
    319,071.48/440,011.62 = 209,980.68/x
  3. Step 3: Cross multiply
    319,071.48x = 440,011.62 × 209,980.68
  4. Step 4: Simplify right side
    319,071.48x = 92,393,939,175.50
  5. Step 5: Solve for x
    x = 92,393,939,175.50/319,071.48
  6. Step 6: Final answer
    x = 289,571.29

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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.