Home / 640,000.04-883,077.90-385,367.72

Finding the Fourth Proportional to 640,000.04, 883,077.90 and 385,367.72

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Solution

The fourth proportional to 640,000.04, 883,077.90 and 385,367.72 is: 531,733.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,000.04 : 883,077.90 = 385,367.72 : x
  2. Step 2: Convert to fraction form
    640,000.04/883,077.90 = 385,367.72/x
  3. Step 3: Cross multiply
    640,000.04x = 883,077.90 × 385,367.72
  4. Step 4: Simplify right side
    640,000.04x = 340,309,716,905.39
  5. Step 5: Solve for x
    x = 340,309,716,905.39/640,000.04
  6. Step 6: Final answer
    x = 531,733.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.