Home / 619,821.40-929,732.10-430,864.60

Finding the Fourth Proportional to 619,821.40, 929,732.10 and 430,864.60

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Solution

The fourth proportional to 619,821.40, 929,732.10 and 430,864.60 is: 646,296.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,821.40 : 929,732.10 = 430,864.60 : x
  2. Step 2: Convert to fraction form
    619,821.40/929,732.10 = 430,864.60/x
  3. Step 3: Cross multiply
    619,821.40x = 929,732.10 × 430,864.60
  4. Step 4: Simplify right side
    619,821.40x = 400,588,649,373.66
  5. Step 5: Solve for x
    x = 400,588,649,373.66/619,821.40
  6. Step 6: Final answer
    x = 646,296.90

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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.