Home / 663,964.23-916,341.60-405,992.37

Finding the Fourth Proportional to 663,964.23, 916,341.60 and 405,992.37

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Solution

The fourth proportional to 663,964.23, 916,341.60 and 405,992.37 is: 560,312.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,964.23 : 916,341.60 = 405,992.37 : x
  2. Step 2: Convert to fraction form
    663,964.23/916,341.60 = 405,992.37/x
  3. Step 3: Cross multiply
    663,964.23x = 916,341.60 × 405,992.37
  4. Step 4: Simplify right side
    663,964.23x = 372,027,697,913.59
  5. Step 5: Solve for x
    x = 372,027,697,913.59/663,964.23
  6. Step 6: Final answer
    x = 560,312.86

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1.5x scale

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.