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Finding the Fourth Proportional to 528,666.32, 729,560.25 and 286,948.94

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Solution

The fourth proportional to 528,666.32, 729,560.25 and 286,948.94 is: 395,989.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,666.32 : 729,560.25 = 286,948.94 : x
  2. Step 2: Convert to fraction form
    528,666.32/729,560.25 = 286,948.94/x
  3. Step 3: Cross multiply
    528,666.32x = 729,560.25 × 286,948.94
  4. Step 4: Simplify right side
    528,666.32x = 209,346,535,321.09
  5. Step 5: Solve for x
    x = 209,346,535,321.09/528,666.32
  6. Step 6: Final answer
    x = 395,989.93

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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.