Home / 319,005.48-439,920.54-209,914.68

Finding the Fourth Proportional to 319,005.48, 439,920.54 and 209,914.68

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Solution

The fourth proportional to 319,005.48, 439,920.54 and 209,914.68 is: 289,480.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,005.48 : 439,920.54 = 209,914.68 : x
  2. Step 2: Convert to fraction form
    319,005.48/439,920.54 = 209,914.68/x
  3. Step 3: Cross multiply
    319,005.48x = 439,920.54 × 209,914.68
  4. Step 4: Simplify right side
    319,005.48x = 92,345,779,379.53
  5. Step 5: Solve for x
    x = 92,345,779,379.53/319,005.48
  6. Step 6: Final answer
    x = 289,480.23

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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.