Home / 319,271.22-478,782.09-139,411.50

Finding the Fourth Proportional to 319,271.22, 478,782.09 and 139,411.50

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Solution

The fourth proportional to 319,271.22, 478,782.09 and 139,411.50 is: 209,062.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,271.22 : 478,782.09 = 139,411.50 : x
  2. Step 2: Convert to fraction form
    319,271.22/478,782.09 = 139,411.50/x
  3. Step 3: Cross multiply
    319,271.22x = 478,782.09 × 139,411.50
  4. Step 4: Simplify right side
    319,271.22x = 66,747,729,340.04
  5. Step 5: Solve for x
    x = 66,747,729,340.04/319,271.22
  6. Step 6: Final answer
    x = 209,062.78

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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.