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Finding the Fourth Proportional to 453,313.40, 679,970.10 and 186,985.40

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Solution

The fourth proportional to 453,313.40, 679,970.10 and 186,985.40 is: 280,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,313.40 : 679,970.10 = 186,985.40 : x
  2. Step 2: Convert to fraction form
    453,313.40/679,970.10 = 186,985.40/x
  3. Step 3: Cross multiply
    453,313.40x = 679,970.10 × 186,985.40
  4. Step 4: Simplify right side
    453,313.40x = 127,144,481,136.54
  5. Step 5: Solve for x
    x = 127,144,481,136.54/453,313.40
  6. Step 6: Final answer
    x = 280,478.10

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Similar ratio
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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.