Home / 456,370.20-685,116.90-287,890.20

Finding the Fourth Proportional to 456,370.20, 685,116.90 and 287,890.20

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Solution

The fourth proportional to 456,370.20, 685,116.90 and 287,890.20 is: 432,189.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,370.20 : 685,116.90 = 287,890.20 : x
  2. Step 2: Convert to fraction form
    456,370.20/685,116.90 = 287,890.20/x
  3. Step 3: Cross multiply
    456,370.20x = 685,116.90 × 287,890.20
  4. Step 4: Simplify right side
    456,370.20x = 197,238,441,364.38
  5. Step 5: Solve for x
    x = 197,238,441,364.38/456,370.20
  6. Step 6: Final answer
    x = 432,189.57

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1.5x scale

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.