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Finding the Fourth Proportional to 620,235.38, 855,477.50 and 569,409.50

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Solution

The fourth proportional to 620,235.38, 855,477.50 and 569,409.50 is: 785,374.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,235.38 : 855,477.50 = 569,409.50 : x
  2. Step 2: Convert to fraction form
    620,235.38/855,477.50 = 569,409.50/x
  3. Step 3: Cross multiply
    620,235.38x = 855,477.50 × 569,409.50
  4. Step 4: Simplify right side
    620,235.38x = 487,117,015,536.25
  5. Step 5: Solve for x
    x = 487,117,015,536.25/620,235.38
  6. Step 6: Final answer
    x = 785,374.44

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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.