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Finding the Fourth Proportional to 316,830.08, 437,212.16 and 189,430.40

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Solution

The fourth proportional to 316,830.08, 437,212.16 and 189,430.40 is: 261,405.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,830.08 : 437,212.16 = 189,430.40 : x
  2. Step 2: Convert to fraction form
    316,830.08/437,212.16 = 189,430.40/x
  3. Step 3: Cross multiply
    316,830.08x = 437,212.16 × 189,430.40
  4. Step 4: Simplify right side
    316,830.08x = 82,821,274,353.66
  5. Step 5: Solve for x
    x = 82,821,274,353.66/316,830.08
  6. Step 6: Final answer
    x = 261,405.97

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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.