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Finding the Fourth Proportional to 628,550.76, 867,383.40 and 342,064.70

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Solution

The fourth proportional to 628,550.76, 867,383.40 and 342,064.70 is: 472,040.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,550.76 : 867,383.40 = 342,064.70 : x
  2. Step 2: Convert to fraction form
    628,550.76/867,383.40 = 342,064.70/x
  3. Step 3: Cross multiply
    628,550.76x = 867,383.40 × 342,064.70
  4. Step 4: Simplify right side
    628,550.76x = 296,701,242,505.98
  5. Step 5: Solve for x
    x = 296,701,242,505.98/628,550.76
  6. Step 6: Final answer
    x = 472,040.23

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Double scale
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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.