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Finding the Fourth Proportional to 456,851.80, 685,320.90 and 124,427.80

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Solution

The fourth proportional to 456,851.80, 685,320.90 and 124,427.80 is: 186,653.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,851.80 : 685,320.90 = 124,427.80 : x
  2. Step 2: Convert to fraction form
    456,851.80/685,320.90 = 124,427.80/x
  3. Step 3: Cross multiply
    456,851.80x = 685,320.90 × 124,427.80
  4. Step 4: Simplify right side
    456,851.80x = 85,272,971,881.02
  5. Step 5: Solve for x
    x = 85,272,971,881.02/456,851.80
  6. Step 6: Final answer
    x = 186,653.47

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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.