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Finding the Fourth Proportional to 691,746.20, 954,609.74 and 389,940.20

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Solution

The fourth proportional to 691,746.20, 954,609.74 and 389,940.20 is: 538,117.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,746.20 : 954,609.74 = 389,940.20 : x
  2. Step 2: Convert to fraction form
    691,746.20/954,609.74 = 389,940.20/x
  3. Step 3: Cross multiply
    691,746.20x = 954,609.74 × 389,940.20
  4. Step 4: Simplify right side
    691,746.20x = 372,240,706,214.80
  5. Step 5: Solve for x
    x = 372,240,706,214.80/691,746.20
  6. Step 6: Final answer
    x = 538,117.46

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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.