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Finding the Fourth Proportional to 870,706.56, 1,201,509.12 and 488,659.56

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Solution

The fourth proportional to 870,706.56, 1,201,509.12 and 488,659.56 is: 674,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,706.56 : 1,201,509.12 = 488,659.56 : x
  2. Step 2: Convert to fraction form
    870,706.56/1,201,509.12 = 488,659.56/x
  3. Step 3: Cross multiply
    870,706.56x = 1,201,509.12 × 488,659.56
  4. Step 4: Simplify right side
    870,706.56x = 587,128,917,915.19
  5. Step 5: Solve for x
    x = 587,128,917,915.19/870,706.56
  6. Step 6: Final answer
    x = 674,313.19

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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.