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Finding the Fourth Proportional to 528,561.71, 729,416.15 and 313,744.85

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Solution

The fourth proportional to 528,561.71, 729,416.15 and 313,744.85 is: 432,968.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,561.71 : 729,416.15 = 313,744.85 : x
  2. Step 2: Convert to fraction form
    528,561.71/729,416.15 = 313,744.85/x
  3. Step 3: Cross multiply
    528,561.71x = 729,416.15 × 313,744.85
  4. Step 4: Simplify right side
    528,561.71x = 228,850,561,030.19
  5. Step 5: Solve for x
    x = 228,850,561,030.19/528,561.71
  6. Step 6: Final answer
    x = 432,968.48

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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.