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Finding the Fourth Proportional to 661,681.10, 993,505.80 and 512,090.30

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Solution

The fourth proportional to 661,681.10, 993,505.80 and 512,090.30 is: 768,897.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,681.10 : 993,505.80 = 512,090.30 : x
  2. Step 2: Convert to fraction form
    661,681.10/993,505.80 = 512,090.30/x
  3. Step 3: Cross multiply
    661,681.10x = 993,505.80 × 512,090.30
  4. Step 4: Simplify right side
    661,681.10x = 508,764,683,173.74
  5. Step 5: Solve for x
    x = 508,764,683,173.74/661,681.10
  6. Step 6: Final answer
    x = 768,897.11

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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.