Home / 308,779.24-426,134.12-172,810.40

Finding the Fourth Proportional to 308,779.24, 426,134.12 and 172,810.40

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Solution

The fourth proportional to 308,779.24, 426,134.12 and 172,810.40 is: 238,488.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,779.24 : 426,134.12 = 172,810.40 : x
  2. Step 2: Convert to fraction form
    308,779.24/426,134.12 = 172,810.40/x
  3. Step 3: Cross multiply
    308,779.24x = 426,134.12 × 172,810.40
  4. Step 4: Simplify right side
    308,779.24x = 73,640,407,730.85
  5. Step 5: Solve for x
    x = 73,640,407,730.85/308,779.24
  6. Step 6: Final answer
    x = 238,488.86

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1.5x scale

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.