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Finding the Fourth Proportional to 398,482.64, 549,889.86 and 217,190.67

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Solution

The fourth proportional to 398,482.64, 549,889.86 and 217,190.67 is: 299,714.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,482.64 : 549,889.86 = 217,190.67 : x
  2. Step 2: Convert to fraction form
    398,482.64/549,889.86 = 217,190.67/x
  3. Step 3: Cross multiply
    398,482.64x = 549,889.86 × 217,190.67
  4. Step 4: Simplify right side
    398,482.64x = 119,430,945,871.98
  5. Step 5: Solve for x
    x = 119,430,945,871.98/398,482.64
  6. Step 6: Final answer
    x = 299,714.30

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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.