Home / 415,918.40-623,877.60-398,422.40

Finding the Fourth Proportional to 415,918.40, 623,877.60 and 398,422.40

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Solution

The fourth proportional to 415,918.40, 623,877.60 and 398,422.40 is: 597,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,918.40 : 623,877.60 = 398,422.40 : x
  2. Step 2: Convert to fraction form
    415,918.40/623,877.60 = 398,422.40/x
  3. Step 3: Cross multiply
    415,918.40x = 623,877.60 × 398,422.40
  4. Step 4: Simplify right side
    415,918.40x = 248,566,810,698.24
  5. Step 5: Solve for x
    x = 248,566,810,698.24/415,918.40
  6. Step 6: Final answer
    x = 597,633.60

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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.