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Finding the Fourth Proportional to 479,905.68, 662,211 and 305,415.72

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Solution

The fourth proportional to 479,905.68, 662,211 and 305,415.72 is: 421,436.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,905.68 : 662,211 = 305,415.72 : x
  2. Step 2: Convert to fraction form
    479,905.68/662,211 = 305,415.72/x
  3. Step 3: Cross multiply
    479,905.68x = 662,211 × 305,415.72
  4. Step 4: Simplify right side
    479,905.68x = 202,249,649,356.92
  5. Step 5: Solve for x
    x = 202,249,649,356.92/479,905.68
  6. Step 6: Final answer
    x = 421,436.25

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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.