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Finding the Fourth Proportional to 397,920.95, 549,113.01 and 216,628.28

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Solution

The fourth proportional to 397,920.95, 549,113.01 and 216,628.28 is: 298,937.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,920.95 : 549,113.01 = 216,628.28 : x
  2. Step 2: Convert to fraction form
    397,920.95/549,113.01 = 216,628.28/x
  3. Step 3: Cross multiply
    397,920.95x = 549,113.01 × 216,628.28
  4. Step 4: Simplify right side
    397,920.95x = 118,953,406,881.92
  5. Step 5: Solve for x
    x = 118,953,406,881.92/397,920.95
  6. Step 6: Final answer
    x = 298,937.28

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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.