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Finding the Fourth Proportional to 421,689.71, 581,945.60 and 230,698.67

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Solution

The fourth proportional to 421,689.71, 581,945.60 and 230,698.67 is: 318,371.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,689.71 : 581,945.60 = 230,698.67 : x
  2. Step 2: Convert to fraction form
    421,689.71/581,945.60 = 230,698.67/x
  3. Step 3: Cross multiply
    421,689.71x = 581,945.60 × 230,698.67
  4. Step 4: Simplify right side
    421,689.71x = 134,254,074,778.86
  5. Step 5: Solve for x
    x = 134,254,074,778.86/421,689.71
  6. Step 6: Final answer
    x = 318,371.71

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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.