Home / 856,871.10-1,285,047.59-257,673.20

Finding the Fourth Proportional to 856,871.10, 1,285,047.59 and 257,673.20

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Solution

The fourth proportional to 856,871.10, 1,285,047.59 and 257,673.20 is: 386,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,871.10 : 1,285,047.59 = 257,673.20 : x
  2. Step 2: Convert to fraction form
    856,871.10/1,285,047.59 = 257,673.20/x
  3. Step 3: Cross multiply
    856,871.10x = 1,285,047.59 × 257,673.20
  4. Step 4: Simplify right side
    856,871.10x = 331,122,316,953.98
  5. Step 5: Solve for x
    x = 331,122,316,953.98/856,871.10
  6. Step 6: Final answer
    x = 386,431.89

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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.