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Finding the Fourth Proportional to 525,905.40, 788,274.90 and 289,417.80

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Solution

The fourth proportional to 525,905.40, 788,274.90 and 289,417.80 is: 433,805.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,905.40 : 788,274.90 = 289,417.80 : x
  2. Step 2: Convert to fraction form
    525,905.40/788,274.90 = 289,417.80/x
  3. Step 3: Cross multiply
    525,905.40x = 788,274.90 × 289,417.80
  4. Step 4: Simplify right side
    525,905.40x = 228,140,787,353.22
  5. Step 5: Solve for x
    x = 228,140,787,353.22/525,905.40
  6. Step 6: Final answer
    x = 433,805.75

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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.