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Finding the Fourth Proportional to 812,648.57, 1,121,358.88 and 468,597.54

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Solution

The fourth proportional to 812,648.57, 1,121,358.88 and 468,597.54 is: 646,609.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,648.57 : 1,121,358.88 = 468,597.54 : x
  2. Step 2: Convert to fraction form
    812,648.57/1,121,358.88 = 468,597.54/x
  3. Step 3: Cross multiply
    812,648.57x = 1,121,358.88 × 468,597.54
  4. Step 4: Simplify right side
    812,648.57x = 525,466,017,416.00
  5. Step 5: Solve for x
    x = 525,466,017,416.00/812,648.57
  6. Step 6: Final answer
    x = 646,609.17

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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.