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Finding the Fourth Proportional to 388,915.99, 536,513.30 and 259,886.15

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Solution

The fourth proportional to 388,915.99, 536,513.30 and 259,886.15 is: 358,515.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,915.99 : 536,513.30 = 259,886.15 : x
  2. Step 2: Convert to fraction form
    388,915.99/536,513.30 = 259,886.15/x
  3. Step 3: Cross multiply
    388,915.99x = 536,513.30 × 259,886.15
  4. Step 4: Simplify right side
    388,915.99x = 139,432,374,370.01
  5. Step 5: Solve for x
    x = 139,432,374,370.01/388,915.99
  6. Step 6: Final answer
    x = 358,515.40

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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.