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Finding the Fourth Proportional to 478,771.52, 659,809.68 and 357,699.20

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Solution

The fourth proportional to 478,771.52, 659,809.68 and 357,699.20 is: 492,956.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,771.52 : 659,809.68 = 357,699.20 : x
  2. Step 2: Convert to fraction form
    478,771.52/659,809.68 = 357,699.20/x
  3. Step 3: Cross multiply
    478,771.52x = 659,809.68 × 357,699.20
  4. Step 4: Simplify right side
    478,771.52x = 236,013,394,688.26
  5. Step 5: Solve for x
    x = 236,013,394,688.26/478,771.52
  6. Step 6: Final answer
    x = 492,956.21

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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.