Home / 685,011.15-945,314.01-383,205.15

Finding the Fourth Proportional to 685,011.15, 945,314.01 and 383,205.15

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Solution

The fourth proportional to 685,011.15, 945,314.01 and 383,205.15 is: 528,822.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,011.15 : 945,314.01 = 383,205.15 : x
  2. Step 2: Convert to fraction form
    685,011.15/945,314.01 = 383,205.15/x
  3. Step 3: Cross multiply
    685,011.15x = 945,314.01 × 383,205.15
  4. Step 4: Simplify right side
    685,011.15x = 362,249,196,999.15
  5. Step 5: Solve for x
    x = 362,249,196,999.15/685,011.15
  6. Step 6: Final answer
    x = 528,822.34

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Double scale
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Similar ratio
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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.