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Finding the Fourth Proportional to 528,194.30, 728,908.47 and 286,476.80

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Solution

The fourth proportional to 528,194.30, 728,908.47 and 286,476.80 is: 395,338.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,194.30 : 728,908.47 = 286,476.80 : x
  2. Step 2: Convert to fraction form
    528,194.30/728,908.47 = 286,476.80/x
  3. Step 3: Cross multiply
    528,194.30x = 728,908.47 × 286,476.80
  4. Step 4: Simplify right side
    528,194.30x = 208,815,362,333.95
  5. Step 5: Solve for x
    x = 208,815,362,333.95/528,194.30
  6. Step 6: Final answer
    x = 395,338.16

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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.