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Finding the Fourth Proportional to 390,156.42, 585,234.60 and 109,673.67

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Solution

The fourth proportional to 390,156.42, 585,234.60 and 109,673.67 is: 164,510.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,156.42 : 585,234.60 = 109,673.67 : x
  2. Step 2: Convert to fraction form
    390,156.42/585,234.60 = 109,673.67/x
  3. Step 3: Cross multiply
    390,156.42x = 585,234.60 × 109,673.67
  4. Step 4: Simplify right side
    390,156.42x = 64,184,826,392.98
  5. Step 5: Solve for x
    x = 64,184,826,392.98/390,156.42
  6. Step 6: Final answer
    x = 164,510.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.