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Finding the Fourth Proportional to 538,779.36, 743,678.64 and 312,480.48

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Solution

The fourth proportional to 538,779.36, 743,678.64 and 312,480.48 is: 431,317.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,779.36 : 743,678.64 = 312,480.48 : x
  2. Step 2: Convert to fraction form
    538,779.36/743,678.64 = 312,480.48/x
  3. Step 3: Cross multiply
    538,779.36x = 743,678.64 × 312,480.48
  4. Step 4: Simplify right side
    538,779.36x = 232,385,058,392.95
  5. Step 5: Solve for x
    x = 232,385,058,392.95/538,779.36
  6. Step 6: Final answer
    x = 431,317.67

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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.