Home / 209,432.43-311,779.91-208,186.87

Finding the Fourth Proportional to 209,432.43, 311,779.91 and 208,186.87

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Solution

The fourth proportional to 209,432.43, 311,779.91 and 208,186.87 is: 309,925.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,432.43 : 311,779.91 = 208,186.87 : x
  2. Step 2: Convert to fraction form
    209,432.43/311,779.91 = 208,186.87/x
  3. Step 3: Cross multiply
    209,432.43x = 311,779.91 × 208,186.87
  4. Step 4: Simplify right side
    209,432.43x = 64,908,483,591.78
  5. Step 5: Solve for x
    x = 64,908,483,591.78/209,432.43
  6. Step 6: Final answer
    x = 309,925.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.