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Finding the Fourth Proportional to 628,019.84, 866,221.76 and 385,984.64

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Solution

The fourth proportional to 628,019.84, 866,221.76 and 385,984.64 is: 532,384.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,019.84 : 866,221.76 = 385,984.64 : x
  2. Step 2: Convert to fraction form
    628,019.84/866,221.76 = 385,984.64/x
  3. Step 3: Cross multiply
    628,019.84x = 866,221.76 × 385,984.64
  4. Step 4: Simplify right side
    628,019.84x = 334,348,294,193.77
  5. Step 5: Solve for x
    x = 334,348,294,193.77/628,019.84
  6. Step 6: Final answer
    x = 532,384.92

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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.