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Finding the Fourth Proportional to 907,764.40, 1,361,938.20 and 608,582.80

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Solution

The fourth proportional to 907,764.40, 1,361,938.20 and 608,582.80 is: 913,069.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,764.40 : 1,361,938.20 = 608,582.80 : x
  2. Step 2: Convert to fraction form
    907,764.40/1,361,938.20 = 608,582.80/x
  3. Step 3: Cross multiply
    907,764.40x = 1,361,938.20 × 608,582.80
  4. Step 4: Simplify right side
    907,764.40x = 828,852,163,182.96
  5. Step 5: Solve for x
    x = 828,852,163,182.96/907,764.40
  6. Step 6: Final answer
    x = 913,069.69

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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.