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Finding the Fourth Proportional to 253,920.80, 380,978.40 and 249,935.60

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Solution

The fourth proportional to 253,920.80, 380,978.40 and 249,935.60 is: 374,999.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,920.80 : 380,978.40 = 249,935.60 : x
  2. Step 2: Convert to fraction form
    253,920.80/380,978.40 = 249,935.60/x
  3. Step 3: Cross multiply
    253,920.80x = 380,978.40 × 249,935.60
  4. Step 4: Simplify right side
    253,920.80x = 95,220,064,991.04
  5. Step 5: Solve for x
    x = 95,220,064,991.04/253,920.80
  6. Step 6: Final answer
    x = 374,999.07

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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.