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Finding the Fourth Proportional to 398,485.65, 549,894 and 217,193.67

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Solution

The fourth proportional to 398,485.65, 549,894 and 217,193.67 is: 299,718.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,485.65 : 549,894 = 217,193.67 : x
  2. Step 2: Convert to fraction form
    398,485.65/549,894 = 217,193.67/x
  3. Step 3: Cross multiply
    398,485.65x = 549,894 × 217,193.67
  4. Step 4: Simplify right side
    398,485.65x = 119,433,495,970.98
  5. Step 5: Solve for x
    x = 119,433,495,970.98/398,485.65
  6. Step 6: Final answer
    x = 299,718.44

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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.