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Finding the Fourth Proportional to 615,458.20, 922,668.90 and 319,970.20

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Solution

The fourth proportional to 615,458.20, 922,668.90 and 319,970.20 is: 479,685.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,458.20 : 922,668.90 = 319,970.20 : x
  2. Step 2: Convert to fraction form
    615,458.20/922,668.90 = 319,970.20/x
  3. Step 3: Cross multiply
    615,458.20x = 922,668.90 × 319,970.20
  4. Step 4: Simplify right side
    615,458.20x = 295,226,552,466.78
  5. Step 5: Solve for x
    x = 295,226,552,466.78/615,458.20
  6. Step 6: Final answer
    x = 479,685.79

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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.