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Finding the Fourth Proportional to 397,855.71, 549,047.88 and 216,572.85

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Solution

The fourth proportional to 397,855.71, 549,047.88 and 216,572.85 is: 298,874.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,855.71 : 549,047.88 = 216,572.85 : x
  2. Step 2: Convert to fraction form
    397,855.71/549,047.88 = 216,572.85/x
  3. Step 3: Cross multiply
    397,855.71x = 549,047.88 × 216,572.85
  4. Step 4: Simplify right side
    397,855.71x = 118,908,864,158.06
  5. Step 5: Solve for x
    x = 118,908,864,158.06/397,855.71
  6. Step 6: Final answer
    x = 298,874.34

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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.