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Finding the Fourth Proportional to 528,157.28, 728,857.44 and 286,439.76

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Solution

The fourth proportional to 528,157.28, 728,857.44 and 286,439.76 is: 395,287.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,157.28 : 728,857.44 = 286,439.76 : x
  2. Step 2: Convert to fraction form
    528,157.28/728,857.44 = 286,439.76/x
  3. Step 3: Cross multiply
    528,157.28x = 728,857.44 × 286,439.76
  4. Step 4: Simplify right side
    528,157.28x = 208,773,750,187.81
  5. Step 5: Solve for x
    x = 208,773,750,187.81/528,157.28
  6. Step 6: Final answer
    x = 395,287.08

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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.