Home / 686,365.90-1,029,068.85-405,738.70

Finding the Fourth Proportional to 686,365.90, 1,029,068.85 and 405,738.70

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Solution

The fourth proportional to 686,365.90, 1,029,068.85 and 405,738.70 is: 608,324.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,365.90 : 1,029,068.85 = 405,738.70 : x
  2. Step 2: Convert to fraction form
    686,365.90/1,029,068.85 = 405,738.70/x
  3. Step 3: Cross multiply
    686,365.90x = 1,029,068.85 × 405,738.70
  4. Step 4: Simplify right side
    686,365.90x = 417,533,057,409.50
  5. Step 5: Solve for x
    x = 417,533,057,409.50/686,365.90
  6. Step 6: Final answer
    x = 608,324.30

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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.