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Finding the Fourth Proportional to 519,624.72, 779,486.76 and 145,646.64

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Solution

The fourth proportional to 519,624.72, 779,486.76 and 145,646.64 is: 218,483.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,624.72 : 779,486.76 = 145,646.64 : x
  2. Step 2: Convert to fraction form
    519,624.72/779,486.76 = 145,646.64/x
  3. Step 3: Cross multiply
    519,624.72x = 779,486.76 × 145,646.64
  4. Step 4: Simplify right side
    519,624.72x = 113,529,627,518.49
  5. Step 5: Solve for x
    x = 113,529,627,518.49/519,624.72
  6. Step 6: Final answer
    x = 218,483.88

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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.