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Finding the Fourth Proportional to 519,802.95, 778,900.74 and 405,680.17

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Solution

The fourth proportional to 519,802.95, 778,900.74 and 405,680.17 is: 607,893.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,802.95 : 778,900.74 = 405,680.17 : x
  2. Step 2: Convert to fraction form
    519,802.95/778,900.74 = 405,680.17/x
  3. Step 3: Cross multiply
    519,802.95x = 778,900.74 × 405,680.17
  4. Step 4: Simplify right side
    519,802.95x = 315,984,580,721.82
  5. Step 5: Solve for x
    x = 315,984,580,721.82/519,802.95
  6. Step 6: Final answer
    x = 607,893.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.