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Finding the Fourth Proportional to 305,358.10, 458,037.15 and 210,879.70

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Solution

The fourth proportional to 305,358.10, 458,037.15 and 210,879.70 is: 316,319.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,358.10 : 458,037.15 = 210,879.70 : x
  2. Step 2: Convert to fraction form
    305,358.10/458,037.15 = 210,879.70/x
  3. Step 3: Cross multiply
    305,358.10x = 458,037.15 × 210,879.70
  4. Step 4: Simplify right side
    305,358.10x = 96,590,736,780.86
  5. Step 5: Solve for x
    x = 96,590,736,780.86/305,358.10
  6. Step 6: Final answer
    x = 316,319.55

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1.5x scale

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.