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Finding the Fourth Proportional to 612,000.30, 918,000.45 and 191,405.10

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Solution

The fourth proportional to 612,000.30, 918,000.45 and 191,405.10 is: 287,107.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,000.30 : 918,000.45 = 191,405.10 : x
  2. Step 2: Convert to fraction form
    612,000.30/918,000.45 = 191,405.10/x
  3. Step 3: Cross multiply
    612,000.30x = 918,000.45 × 191,405.10
  4. Step 4: Simplify right side
    612,000.30x = 175,709,967,932.30
  5. Step 5: Solve for x
    x = 175,709,967,932.30/612,000.30
  6. Step 6: Final answer
    x = 287,107.65

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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.