Home / 645,121.78-890,298.42-358,646.64

Finding the Fourth Proportional to 645,121.78, 890,298.42 and 358,646.64

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Solution

The fourth proportional to 645,121.78, 890,298.42 and 358,646.64 is: 494,949.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,121.78 : 890,298.42 = 358,646.64 : x
  2. Step 2: Convert to fraction form
    645,121.78/890,298.42 = 358,646.64/x
  3. Step 3: Cross multiply
    645,121.78x = 890,298.42 × 358,646.64
  4. Step 4: Simplify right side
    645,121.78x = 319,302,536,930.31
  5. Step 5: Solve for x
    x = 319,302,536,930.31/645,121.78
  6. Step 6: Final answer
    x = 494,949.24

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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.