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Finding the Fourth Proportional to 478,422.40, 660,103.68 and 308,452

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Solution

The fourth proportional to 478,422.40, 660,103.68 and 308,452 is: 425,586.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,422.40 : 660,103.68 = 308,452 : x
  2. Step 2: Convert to fraction form
    478,422.40/660,103.68 = 308,452/x
  3. Step 3: Cross multiply
    478,422.40x = 660,103.68 × 308,452
  4. Step 4: Simplify right side
    478,422.40x = 203,610,300,303.36
  5. Step 5: Solve for x
    x = 203,610,300,303.36/478,422.40
  6. Step 6: Final answer
    x = 425,586.89

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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.