Home / 645,823.40-966,431.10-409,279.40

Finding the Fourth Proportional to 645,823.40, 966,431.10 and 409,279.40

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Solution

The fourth proportional to 645,823.40, 966,431.10 and 409,279.40 is: 612,458.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,823.40 : 966,431.10 = 409,279.40 : x
  2. Step 2: Convert to fraction form
    645,823.40/966,431.10 = 409,279.40/x
  3. Step 3: Cross multiply
    645,823.40x = 966,431.10 × 409,279.40
  4. Step 4: Simplify right side
    645,823.40x = 395,540,340,749.34
  5. Step 5: Solve for x
    x = 395,540,340,749.34/645,823.40
  6. Step 6: Final answer
    x = 612,458.98

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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.