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Finding the Fourth Proportional to 528,706.62, 729,612.72 and 286,987.23

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Solution

The fourth proportional to 528,706.62, 729,612.72 and 286,987.23 is: 396,041.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,706.62 : 729,612.72 = 286,987.23 : x
  2. Step 2: Convert to fraction form
    528,706.62/729,612.72 = 286,987.23/x
  3. Step 3: Cross multiply
    528,706.62x = 729,612.72 × 286,987.23
  4. Step 4: Simplify right side
    528,706.62x = 209,389,533,485.57
  5. Step 5: Solve for x
    x = 209,389,533,485.57/528,706.62
  6. Step 6: Final answer
    x = 396,041.07

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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.