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Finding the Fourth Proportional to 909,942.60, 1,364,913.90 and 890,259.60

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Solution

The fourth proportional to 909,942.60, 1,364,913.90 and 890,259.60 is: 1,335,389.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,942.60 : 1,364,913.90 = 890,259.60 : x
  2. Step 2: Convert to fraction form
    909,942.60/1,364,913.90 = 890,259.60/x
  3. Step 3: Cross multiply
    909,942.60x = 1,364,913.90 × 890,259.60
  4. Step 4: Simplify right side
    909,942.60x = 1,215,127,702,648.44
  5. Step 5: Solve for x
    x = 1,215,127,702,648.44/909,942.60
  6. Step 6: Final answer
    x = 1,335,389.40

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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.