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Finding the Fourth Proportional to 717,365.65, 989,952.53 and 395,105.76

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Solution

The fourth proportional to 717,365.65, 989,952.53 and 395,105.76 is: 545,239.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,365.65 : 989,952.53 = 395,105.76 : x
  2. Step 2: Convert to fraction form
    717,365.65/989,952.53 = 395,105.76/x
  3. Step 3: Cross multiply
    717,365.65x = 989,952.53 × 395,105.76
  4. Step 4: Simplify right side
    717,365.65x = 391,135,941,779.81
  5. Step 5: Solve for x
    x = 391,135,941,779.81/717,365.65
  6. Step 6: Final answer
    x = 545,239.30

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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.