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Finding the Fourth Proportional to 525,679.13, 788,518.62 and 126,319.91

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Solution

The fourth proportional to 525,679.13, 788,518.62 and 126,319.91 is: 189,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,679.13 : 788,518.62 = 126,319.91 : x
  2. Step 2: Convert to fraction form
    525,679.13/788,518.62 = 126,319.91/x
  3. Step 3: Cross multiply
    525,679.13x = 788,518.62 × 126,319.91
  4. Step 4: Simplify right side
    525,679.13x = 99,605,601,111.72
  5. Step 5: Solve for x
    x = 99,605,601,111.72/525,679.13
  6. Step 6: Final answer
    x = 189,479.85

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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.