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Finding the Fourth Proportional to 520,279.20, 785,408.40 and 515,030.40

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Solution

The fourth proportional to 520,279.20, 785,408.40 and 515,030.40 is: 777,484.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,279.20 : 785,408.40 = 515,030.40 : x
  2. Step 2: Convert to fraction form
    520,279.20/785,408.40 = 515,030.40/x
  3. Step 3: Cross multiply
    520,279.20x = 785,408.40 × 515,030.40
  4. Step 4: Simplify right side
    520,279.20x = 404,509,202,415.36
  5. Step 5: Solve for x
    x = 404,509,202,415.36/520,279.20
  6. Step 6: Final answer
    x = 777,484.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.