Home / 870,260.87-1,200,980.67-488,315.90

Finding the Fourth Proportional to 870,260.87, 1,200,980.67 and 488,315.90

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Solution

The fourth proportional to 870,260.87, 1,200,980.67 and 488,315.90 is: 673,887.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,260.87 : 1,200,980.67 = 488,315.90 : x
  2. Step 2: Convert to fraction form
    870,260.87/1,200,980.67 = 488,315.90/x
  3. Step 3: Cross multiply
    870,260.87x = 1,200,980.67 × 488,315.90
  4. Step 4: Simplify right side
    870,260.87x = 586,457,950,748.75
  5. Step 5: Solve for x
    x = 586,457,950,748.75/870,260.87
  6. Step 6: Final answer
    x = 673,887.54

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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.