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Finding the Fourth Proportional to 586,683.72, 809,989.20 and 403,238.16

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Solution

The fourth proportional to 586,683.72, 809,989.20 and 403,238.16 is: 556,719.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,683.72 : 809,989.20 = 403,238.16 : x
  2. Step 2: Convert to fraction form
    586,683.72/809,989.20 = 403,238.16/x
  3. Step 3: Cross multiply
    586,683.72x = 809,989.20 × 403,238.16
  4. Step 4: Simplify right side
    586,683.72x = 326,618,554,627.87
  5. Step 5: Solve for x
    x = 326,618,554,627.87/586,683.72
  6. Step 6: Final answer
    x = 556,719.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.