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Finding the Fourth Proportional to 528,011.06, 728,655.28 and 286,293.56

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Solution

The fourth proportional to 528,011.06, 728,655.28 and 286,293.56 is: 395,085.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,011.06 : 728,655.28 = 286,293.56 : x
  2. Step 2: Convert to fraction form
    528,011.06/728,655.28 = 286,293.56/x
  3. Step 3: Cross multiply
    528,011.06x = 728,655.28 × 286,293.56
  4. Step 4: Simplify right side
    528,011.06x = 208,609,309,764.99
  5. Step 5: Solve for x
    x = 208,609,309,764.99/528,011.06
  6. Step 6: Final answer
    x = 395,085.12

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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.