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Finding the Fourth Proportional to 397,989.35, 549,212.50 and 216,699.81

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Solution

The fourth proportional to 397,989.35, 549,212.50 and 216,699.81 is: 299,038.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,989.35 : 549,212.50 = 216,699.81 : x
  2. Step 2: Convert to fraction form
    397,989.35/549,212.50 = 216,699.81/x
  3. Step 3: Cross multiply
    397,989.35x = 549,212.50 × 216,699.81
  4. Step 4: Simplify right side
    397,989.35x = 119,014,242,610.95
  5. Step 5: Solve for x
    x = 119,014,242,610.95/397,989.35
  6. Step 6: Final answer
    x = 299,038.76

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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.