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Finding the Fourth Proportional to 261,998.40, 393,386.40 and 183,460.80

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Solution

The fourth proportional to 261,998.40, 393,386.40 and 183,460.80 is: 275,463.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,998.40 : 393,386.40 = 183,460.80 : x
  2. Step 2: Convert to fraction form
    261,998.40/393,386.40 = 183,460.80/x
  3. Step 3: Cross multiply
    261,998.40x = 393,386.40 × 183,460.80
  4. Step 4: Simplify right side
    261,998.40x = 72,170,983,653.12
  5. Step 5: Solve for x
    x = 72,170,983,653.12/261,998.40
  6. Step 6: Final answer
    x = 275,463.45

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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.