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Finding the Fourth Proportional to 386,642.65, 579,779.90 and 158,902.67

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Solution

The fourth proportional to 386,642.65, 579,779.90 and 158,902.67 is: 238,278.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,642.65 : 579,779.90 = 158,902.67 : x
  2. Step 2: Convert to fraction form
    386,642.65/579,779.90 = 158,902.67/x
  3. Step 3: Cross multiply
    386,642.65x = 579,779.90 × 158,902.67
  4. Step 4: Simplify right side
    386,642.65x = 92,128,574,189.44
  5. Step 5: Solve for x
    x = 92,128,574,189.44/386,642.65
  6. Step 6: Final answer
    x = 238,278.35

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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.