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Finding the Fourth Proportional to 936,880, 1,405,109.80 and 430,955.11

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Solution

The fourth proportional to 936,880, 1,405,109.80 and 430,955.11 is: 646,335.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    936,880 : 1,405,109.80 = 430,955.11 : x
  2. Step 2: Convert to fraction form
    936,880/1,405,109.80 = 430,955.11/x
  3. Step 3: Cross multiply
    936,880x = 1,405,109.80 × 430,955.11
  4. Step 4: Simplify right side
    936,880x = 605,539,248,421.08
  5. Step 5: Solve for x
    x = 605,539,248,421.08/936,880
  6. Step 6: Final answer
    x = 646,335.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.