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Finding the Fourth Proportional to 518,070.86, 714,664.14 and 356,645.66

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Solution

The fourth proportional to 518,070.86, 714,664.14 and 356,645.66 is: 491,982.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,070.86 : 714,664.14 = 356,645.66 : x
  2. Step 2: Convert to fraction form
    518,070.86/714,664.14 = 356,645.66/x
  3. Step 3: Cross multiply
    518,070.86x = 714,664.14 × 356,645.66
  4. Step 4: Simplify right side
    518,070.86x = 254,881,863,888.63
  5. Step 5: Solve for x
    x = 254,881,863,888.63/518,070.86
  6. Step 6: Final answer
    x = 491,982.63

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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.