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Finding the Fourth Proportional to 923,806.60, 1,385,709.90 and 608,619.40

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Solution

The fourth proportional to 923,806.60, 1,385,709.90 and 608,619.40 is: 912,929.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    923,806.60 : 1,385,709.90 = 608,619.40 : x
  2. Step 2: Convert to fraction form
    923,806.60/1,385,709.90 = 608,619.40/x
  3. Step 3: Cross multiply
    923,806.60x = 1,385,709.90 × 608,619.40
  4. Step 4: Simplify right side
    923,806.60x = 843,369,927,912.06
  5. Step 5: Solve for x
    x = 843,369,927,912.06/923,806.60
  6. Step 6: Final answer
    x = 912,929.10

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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.