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Finding the Fourth Proportional to 615,939.80, 923,909.70 and 512,259.80

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Solution

The fourth proportional to 615,939.80, 923,909.70 and 512,259.80 is: 768,389.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,939.80 : 923,909.70 = 512,259.80 : x
  2. Step 2: Convert to fraction form
    615,939.80/923,909.70 = 512,259.80/x
  3. Step 3: Cross multiply
    615,939.80x = 923,909.70 × 512,259.80
  4. Step 4: Simplify right side
    615,939.80x = 473,281,798,140.06
  5. Step 5: Solve for x
    x = 473,281,798,140.06/615,939.80
  6. Step 6: Final answer
    x = 768,389.70

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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.