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Finding the Fourth Proportional to 628,738.71, 867,659.45 and 342,260.88

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Solution

The fourth proportional to 628,738.71, 867,659.45 and 342,260.88 is: 472,320.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,738.71 : 867,659.45 = 342,260.88 : x
  2. Step 2: Convert to fraction form
    628,738.71/867,659.45 = 342,260.88/x
  3. Step 3: Cross multiply
    628,738.71x = 867,659.45 × 342,260.88
  4. Step 4: Simplify right side
    628,738.71x = 296,965,885,186.01
  5. Step 5: Solve for x
    x = 296,965,885,186.01/628,738.71
  6. Step 6: Final answer
    x = 472,320.03

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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.