Home / 645,822.40-966,429.60-409,278.40

Finding the Fourth Proportional to 645,822.40, 966,429.60 and 409,278.40

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Solution

The fourth proportional to 645,822.40, 966,429.60 and 409,278.40 is: 612,457.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,822.40 : 966,429.60 = 409,278.40 : x
  2. Step 2: Convert to fraction form
    645,822.40/966,429.60 = 409,278.40/x
  3. Step 3: Cross multiply
    645,822.40x = 966,429.60 × 409,278.40
  4. Step 4: Simplify right side
    645,822.40x = 395,538,760,400.64
  5. Step 5: Solve for x
    x = 395,538,760,400.64/645,822.40
  6. Step 6: Final answer
    x = 612,457.48

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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.