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Finding the Fourth Proportional to 521,809.90, 719,779.38 and 344,999.71

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Solution

The fourth proportional to 521,809.90, 719,779.38 and 344,999.71 is: 475,889.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,809.90 : 719,779.38 = 344,999.71 : x
  2. Step 2: Convert to fraction form
    521,809.90/719,779.38 = 344,999.71/x
  3. Step 3: Cross multiply
    521,809.90x = 719,779.38 × 344,999.71
  4. Step 4: Simplify right side
    521,809.90x = 248,323,677,363.98
  5. Step 5: Solve for x
    x = 248,323,677,363.98/521,809.90
  6. Step 6: Final answer
    x = 475,889.16

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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.