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Finding the Fourth Proportional to 528,622.61, 729,499.92 and 286,905.19

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Solution

The fourth proportional to 528,622.61, 729,499.92 and 286,905.19 is: 395,929.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,622.61 : 729,499.92 = 286,905.19 : x
  2. Step 2: Convert to fraction form
    528,622.61/729,499.92 = 286,905.19/x
  3. Step 3: Cross multiply
    528,622.61x = 729,499.92 × 286,905.19
  4. Step 4: Simplify right side
    528,622.61x = 209,297,313,152.59
  5. Step 5: Solve for x
    x = 209,297,313,152.59/528,622.61
  6. Step 6: Final answer
    x = 395,929.55

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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.