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Finding the Fourth Proportional to 430,327.80, 645,491.70 and 259,085.70

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Solution

The fourth proportional to 430,327.80, 645,491.70 and 259,085.70 is: 388,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,327.80 : 645,491.70 = 259,085.70 : x
  2. Step 2: Convert to fraction form
    430,327.80/645,491.70 = 259,085.70/x
  3. Step 3: Cross multiply
    430,327.80x = 645,491.70 × 259,085.70
  4. Step 4: Simplify right side
    430,327.80x = 167,237,668,938.69
  5. Step 5: Solve for x
    x = 167,237,668,938.69/430,327.80
  6. Step 6: Final answer
    x = 388,628.55

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Similar ratio
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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.