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Finding the Fourth Proportional to 648,354.28, 894,779.62 and 361,917.40

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Solution

The fourth proportional to 648,354.28, 894,779.62 and 361,917.40 is: 499,474.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,354.28 : 894,779.62 = 361,917.40 : x
  2. Step 2: Convert to fraction form
    648,354.28/894,779.62 = 361,917.40/x
  3. Step 3: Cross multiply
    648,354.28x = 894,779.62 × 361,917.40
  4. Step 4: Simplify right side
    648,354.28x = 323,836,313,643.39
  5. Step 5: Solve for x
    x = 323,836,313,643.39/648,354.28
  6. Step 6: Final answer
    x = 499,474.32

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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.