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Finding the Fourth Proportional to 620,334.45, 856,061.73 and 348,402.74

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Solution

The fourth proportional to 620,334.45, 856,061.73 and 348,402.74 is: 480,795.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,334.45 : 856,061.73 = 348,402.74 : x
  2. Step 2: Convert to fraction form
    620,334.45/856,061.73 = 348,402.74/x
  3. Step 3: Cross multiply
    620,334.45x = 856,061.73 × 348,402.74
  4. Step 4: Simplify right side
    620,334.45x = 298,254,248,060.83
  5. Step 5: Solve for x
    x = 298,254,248,060.83/620,334.45
  6. Step 6: Final answer
    x = 480,795.88

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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.