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Finding the Fourth Proportional to 615,673.30, 921,841.71 and 319,563.22

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Solution

The fourth proportional to 615,673.30, 921,841.71 and 319,563.22 is: 478,478.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,673.30 : 921,841.71 = 319,563.22 : x
  2. Step 2: Convert to fraction form
    615,673.30/921,841.71 = 319,563.22/x
  3. Step 3: Cross multiply
    615,673.30x = 921,841.71 × 319,563.22
  4. Step 4: Simplify right side
    615,673.30x = 294,586,705,177.91
  5. Step 5: Solve for x
    x = 294,586,705,177.91/615,673.30
  6. Step 6: Final answer
    x = 478,478.94

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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.