Home / 415,897.20-623,845.80-389,653.20

Finding the Fourth Proportional to 415,897.20, 623,845.80 and 389,653.20

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Solution

The fourth proportional to 415,897.20, 623,845.80 and 389,653.20 is: 584,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,897.20 : 623,845.80 = 389,653.20 : x
  2. Step 2: Convert to fraction form
    415,897.20/623,845.80 = 389,653.20/x
  3. Step 3: Cross multiply
    415,897.20x = 623,845.80 × 389,653.20
  4. Step 4: Simplify right side
    415,897.20x = 243,083,512,276.56
  5. Step 5: Solve for x
    x = 243,083,512,276.56/415,897.20
  6. Step 6: Final answer
    x = 584,479.80

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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.