Home / 899,590.30-1,241,400.56-491,688.78

Finding the Fourth Proportional to 899,590.30, 1,241,400.56 and 491,688.78

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Solution

The fourth proportional to 899,590.30, 1,241,400.56 and 491,688.78 is: 678,511.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    899,590.30 : 1,241,400.56 = 491,688.78 : x
  2. Step 2: Convert to fraction form
    899,590.30/1,241,400.56 = 491,688.78/x
  3. Step 3: Cross multiply
    899,590.30x = 1,241,400.56 × 491,688.78
  4. Step 4: Simplify right side
    899,590.30x = 610,382,726,837.72
  5. Step 5: Solve for x
    x = 610,382,726,837.72/899,590.30
  6. Step 6: Final answer
    x = 678,511.90

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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.