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Finding the Fourth Proportional to 615,673.80, 921,842.46 and 319,563.72

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Solution

The fourth proportional to 615,673.80, 921,842.46 and 319,563.72 is: 478,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,673.80 : 921,842.46 = 319,563.72 : x
  2. Step 2: Convert to fraction form
    615,673.80/921,842.46 = 319,563.72/x
  3. Step 3: Cross multiply
    615,673.80x = 921,842.46 × 319,563.72
  4. Step 4: Simplify right side
    615,673.80x = 294,587,405,771.55
  5. Step 5: Solve for x
    x = 294,587,405,771.55/615,673.80
  6. Step 6: Final answer
    x = 478,479.68

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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.