Home / 342,639.90-512,975.70-209,779.65

Finding the Fourth Proportional to 342,639.90, 512,975.70 and 209,779.65

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Solution

The fourth proportional to 342,639.90, 512,975.70 and 209,779.65 is: 314,066.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,639.90 : 512,975.70 = 209,779.65 : x
  2. Step 2: Convert to fraction form
    342,639.90/512,975.70 = 209,779.65/x
  3. Step 3: Cross multiply
    342,639.90x = 512,975.70 × 209,779.65
  4. Step 4: Simplify right side
    342,639.90x = 107,611,862,804.51
  5. Step 5: Solve for x
    x = 107,611,862,804.51/342,639.90
  6. Step 6: Final answer
    x = 314,066.93

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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.