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Finding the Fourth Proportional to 612,796.60, 918,417.30 and 542,812.60

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Solution

The fourth proportional to 612,796.60, 918,417.30 and 542,812.60 is: 813,530.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,796.60 : 918,417.30 = 542,812.60 : x
  2. Step 2: Convert to fraction form
    612,796.60/918,417.30 = 542,812.60/x
  3. Step 3: Cross multiply
    612,796.60x = 918,417.30 × 542,812.60
  4. Step 4: Simplify right side
    612,796.60x = 498,528,482,497.98
  5. Step 5: Solve for x
    x = 498,528,482,497.98/612,796.60
  6. Step 6: Final answer
    x = 813,530.11

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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.