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Finding the Fourth Proportional to 448,885.40, 619,275.98 and 312,999.80

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Solution

The fourth proportional to 448,885.40, 619,275.98 and 312,999.80 is: 431,810.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,885.40 : 619,275.98 = 312,999.80 : x
  2. Step 2: Convert to fraction form
    448,885.40/619,275.98 = 312,999.80/x
  3. Step 3: Cross multiply
    448,885.40x = 619,275.98 × 312,999.80
  4. Step 4: Simplify right side
    448,885.40x = 193,833,255,570.92
  5. Step 5: Solve for x
    x = 193,833,255,570.92/448,885.40
  6. Step 6: Final answer
    x = 431,810.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.