Home / 519,786.15-717,307.39-290,353.11

Finding the Fourth Proportional to 519,786.15, 717,307.39 and 290,353.11

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Solution

The fourth proportional to 519,786.15, 717,307.39 and 290,353.11 is: 400,688.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,786.15 : 717,307.39 = 290,353.11 : x
  2. Step 2: Convert to fraction form
    519,786.15/717,307.39 = 290,353.11/x
  3. Step 3: Cross multiply
    519,786.15x = 717,307.39 × 290,353.11
  4. Step 4: Simplify right side
    519,786.15x = 208,272,430,794.64
  5. Step 5: Solve for x
    x = 208,272,430,794.64/519,786.15
  6. Step 6: Final answer
    x = 400,688.69

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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.