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Finding the Fourth Proportional to 645,883.20, 967,903.20 and 476,078.40

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Solution

The fourth proportional to 645,883.20, 967,903.20 and 476,078.40 is: 713,438.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,883.20 : 967,903.20 = 476,078.40 : x
  2. Step 2: Convert to fraction form
    645,883.20/967,903.20 = 476,078.40/x
  3. Step 3: Cross multiply
    645,883.20x = 967,903.20 × 476,078.40
  4. Step 4: Simplify right side
    645,883.20x = 460,797,806,810.88
  5. Step 5: Solve for x
    x = 460,797,806,810.88/645,883.20
  6. Step 6: Final answer
    x = 713,438.29

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1.5x scale

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.