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Finding the Fourth Proportional to 646,109.26, 891,660.09 and 359,647.63

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Solution

The fourth proportional to 646,109.26, 891,660.09 and 359,647.63 is: 496,330.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,109.26 : 891,660.09 = 359,647.63 : x
  2. Step 2: Convert to fraction form
    646,109.26/891,660.09 = 359,647.63/x
  3. Step 3: Cross multiply
    646,109.26x = 891,660.09 × 359,647.63
  4. Step 4: Simplify right side
    646,109.26x = 320,683,438,134.09
  5. Step 5: Solve for x
    x = 320,683,438,134.09/646,109.26
  6. Step 6: Final answer
    x = 496,330.05

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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.