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Finding the Fourth Proportional to 615,421.96, 923,464.40 and 299,878.86

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Solution

The fourth proportional to 615,421.96, 923,464.40 and 299,878.86 is: 449,979.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,421.96 : 923,464.40 = 299,878.86 : x
  2. Step 2: Convert to fraction form
    615,421.96/923,464.40 = 299,878.86/x
  3. Step 3: Cross multiply
    615,421.96x = 923,464.40 × 299,878.86
  4. Step 4: Simplify right side
    615,421.96x = 276,927,451,522.58
  5. Step 5: Solve for x
    x = 276,927,451,522.58/615,421.96
  6. Step 6: Final answer
    x = 449,979.80

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1.5x scale

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.