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Finding the Fourth Proportional to 537,145.60, 805,718.40 and 257,209.60

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Solution

The fourth proportional to 537,145.60, 805,718.40 and 257,209.60 is: 385,814.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,145.60 : 805,718.40 = 257,209.60 : x
  2. Step 2: Convert to fraction form
    537,145.60/805,718.40 = 257,209.60/x
  3. Step 3: Cross multiply
    537,145.60x = 805,718.40 × 257,209.60
  4. Step 4: Simplify right side
    537,145.60x = 207,238,507,376.64
  5. Step 5: Solve for x
    x = 207,238,507,376.64/537,145.60
  6. Step 6: Final answer
    x = 385,814.40

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Double scale
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Similar ratio
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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.