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Finding the Fourth Proportional to 646,012.75, 891,497.60 and 359,600.50

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Solution

The fourth proportional to 646,012.75, 891,497.60 and 359,600.50 is: 496,248.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,012.75 : 891,497.60 = 359,600.50 : x
  2. Step 2: Convert to fraction form
    646,012.75/891,497.60 = 359,600.50/x
  3. Step 3: Cross multiply
    646,012.75x = 891,497.60 × 359,600.50
  4. Step 4: Simplify right side
    646,012.75x = 320,582,982,708.80
  5. Step 5: Solve for x
    x = 320,582,982,708.80/646,012.75
  6. Step 6: Final answer
    x = 496,248.69

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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.