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Finding the Fourth Proportional to 515,397.99, 711,248.54 and 289,041.51

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Solution

The fourth proportional to 515,397.99, 711,248.54 and 289,041.51 is: 398,876.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,397.99 : 711,248.54 = 289,041.51 : x
  2. Step 2: Convert to fraction form
    515,397.99/711,248.54 = 289,041.51/x
  3. Step 3: Cross multiply
    515,397.99x = 711,248.54 × 289,041.51
  4. Step 4: Simplify right side
    515,397.99x = 205,580,350,541.69
  5. Step 5: Solve for x
    x = 205,580,350,541.69/515,397.99
  6. Step 6: Final answer
    x = 398,876.90

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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.