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Finding the Fourth Proportional to 646,012.38, 891,488.26 and 359,532.54

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Solution

The fourth proportional to 646,012.38, 891,488.26 and 359,532.54 is: 496,149.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,012.38 : 891,488.26 = 359,532.54 : x
  2. Step 2: Convert to fraction form
    646,012.38/891,488.26 = 359,532.54/x
  3. Step 3: Cross multiply
    646,012.38x = 891,488.26 × 359,532.54
  4. Step 4: Simplify right side
    646,012.38x = 320,519,038,497.98
  5. Step 5: Solve for x
    x = 320,519,038,497.98/646,012.38
  6. Step 6: Final answer
    x = 496,149.99

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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.