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Finding the Fourth Proportional to 931,108.96, 1,285,080.08 and 870,326

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Solution

The fourth proportional to 931,108.96, 1,285,080.08 and 870,326 is: 1,201,189.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,108.96 : 1,285,080.08 = 870,326 : x
  2. Step 2: Convert to fraction form
    931,108.96/1,285,080.08 = 870,326/x
  3. Step 3: Cross multiply
    931,108.96x = 1,285,080.08 × 870,326
  4. Step 4: Simplify right side
    931,108.96x = 1,118,438,605,706.08
  5. Step 5: Solve for x
    x = 1,118,438,605,706.08/931,108.96
  6. Step 6: Final answer
    x = 1,201,189.82

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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.