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Finding the Fourth Proportional to 612,111.80, 918,167.70 and 433,652.60

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Solution

The fourth proportional to 612,111.80, 918,167.70 and 433,652.60 is: 650,478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,111.80 : 918,167.70 = 433,652.60 : x
  2. Step 2: Convert to fraction form
    612,111.80/918,167.70 = 433,652.60/x
  3. Step 3: Cross multiply
    612,111.80x = 918,167.70 × 433,652.60
  4. Step 4: Simplify right side
    612,111.80x = 398,165,810,341.02
  5. Step 5: Solve for x
    x = 398,165,810,341.02/612,111.80
  6. Step 6: Final answer
    x = 650,478.90

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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.