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Finding the Fourth Proportional to 458,668.80, 688,003.20 and 308,980.80

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Solution

The fourth proportional to 458,668.80, 688,003.20 and 308,980.80 is: 463,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,668.80 : 688,003.20 = 308,980.80 : x
  2. Step 2: Convert to fraction form
    458,668.80/688,003.20 = 308,980.80/x
  3. Step 3: Cross multiply
    458,668.80x = 688,003.20 × 308,980.80
  4. Step 4: Simplify right side
    458,668.80x = 212,579,779,138.56
  5. Step 5: Solve for x
    x = 212,579,779,138.56/458,668.80
  6. Step 6: Final answer
    x = 463,471.20

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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.