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Finding the Fourth Proportional to 646,129.76, 891,639.22 and 359,642.48

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Solution

The fourth proportional to 646,129.76, 891,639.22 and 359,642.48 is: 496,295.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,129.76 : 891,639.22 = 359,642.48 : x
  2. Step 2: Convert to fraction form
    646,129.76/891,639.22 = 359,642.48/x
  3. Step 3: Cross multiply
    646,129.76x = 891,639.22 × 359,642.48
  4. Step 4: Simplify right side
    646,129.76x = 320,671,340,346.07
  5. Step 5: Solve for x
    x = 320,671,340,346.07/646,129.76
  6. Step 6: Final answer
    x = 496,295.57

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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.