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Finding the Fourth Proportional to 525,818.37, 788,960.85 and 390,749.25

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Solution

The fourth proportional to 525,818.37, 788,960.85 and 390,749.25 is: 586,297.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,818.37 : 788,960.85 = 390,749.25 : x
  2. Step 2: Convert to fraction form
    525,818.37/788,960.85 = 390,749.25/x
  3. Step 3: Cross multiply
    525,818.37x = 788,960.85 × 390,749.25
  4. Step 4: Simplify right side
    525,818.37x = 308,285,860,416.86
  5. Step 5: Solve for x
    x = 308,285,860,416.86/525,818.37
  6. Step 6: Final answer
    x = 586,297.24

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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.