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Finding the Fourth Proportional to 713,826.65, 985,108.35 and 391,550.33

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Solution

The fourth proportional to 713,826.65, 985,108.35 and 391,550.33 is: 540,354.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,826.65 : 985,108.35 = 391,550.33 : x
  2. Step 2: Convert to fraction form
    713,826.65/985,108.35 = 391,550.33/x
  3. Step 3: Cross multiply
    713,826.65x = 985,108.35 × 391,550.33
  4. Step 4: Simplify right side
    713,826.65x = 385,719,494,602.71
  5. Step 5: Solve for x
    x = 385,719,494,602.71/713,826.65
  6. Step 6: Final answer
    x = 540,354.58

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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.