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Finding the Fourth Proportional to 640,111.15, 883,346.74 and 353,612.53

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Solution

The fourth proportional to 640,111.15, 883,346.74 and 353,612.53 is: 487,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,111.15 : 883,346.74 = 353,612.53 : x
  2. Step 2: Convert to fraction form
    640,111.15/883,346.74 = 353,612.53/x
  3. Step 3: Cross multiply
    640,111.15x = 883,346.74 × 353,612.53
  4. Step 4: Simplify right side
    640,111.15x = 312,362,475,598.65
  5. Step 5: Solve for x
    x = 312,362,475,598.65/640,111.15
  6. Step 6: Final answer
    x = 487,981.62

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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.