Home / 415,821.20-623,731.80-257,536.40

Finding the Fourth Proportional to 415,821.20, 623,731.80 and 257,536.40

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Solution

The fourth proportional to 415,821.20, 623,731.80 and 257,536.40 is: 386,304.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,821.20 : 623,731.80 = 257,536.40 : x
  2. Step 2: Convert to fraction form
    415,821.20/623,731.80 = 257,536.40/x
  3. Step 3: Cross multiply
    415,821.20x = 623,731.80 × 257,536.40
  4. Step 4: Simplify right side
    415,821.20x = 160,633,642,337.52
  5. Step 5: Solve for x
    x = 160,633,642,337.52/415,821.20
  6. Step 6: Final answer
    x = 386,304.60

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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.