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Finding the Fourth Proportional to 421,426.45, 581,520.76 and 249,349.69

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Solution

The fourth proportional to 421,426.45, 581,520.76 and 249,349.69 is: 344,074.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,426.45 : 581,520.76 = 249,349.69 : x
  2. Step 2: Convert to fraction form
    421,426.45/581,520.76 = 249,349.69/x
  3. Step 3: Cross multiply
    421,426.45x = 581,520.76 × 249,349.69
  4. Step 4: Simplify right side
    421,426.45x = 145,002,021,234.56
  5. Step 5: Solve for x
    x = 145,002,021,234.56/421,426.45
  6. Step 6: Final answer
    x = 344,074.32

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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.