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Finding the Fourth Proportional to 620,417.16, 856,157 and 344,774.08

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Solution

The fourth proportional to 620,417.16, 856,157 and 344,774.08 is: 475,777.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,417.16 : 856,157 = 344,774.08 : x
  2. Step 2: Convert to fraction form
    620,417.16/856,157 = 344,774.08/x
  3. Step 3: Cross multiply
    620,417.16x = 856,157 × 344,774.08
  4. Step 4: Simplify right side
    620,417.16x = 295,180,742,010.56
  5. Step 5: Solve for x
    x = 295,180,742,010.56/620,417.16
  6. Step 6: Final answer
    x = 475,777.85

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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.