Home / 619,904.48-855,440.16-378,148.64

Finding the Fourth Proportional to 619,904.48, 855,440.16 and 378,148.64

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Solution

The fourth proportional to 619,904.48, 855,440.16 and 378,148.64 is: 521,828.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,904.48 : 855,440.16 = 378,148.64 : x
  2. Step 2: Convert to fraction form
    619,904.48/855,440.16 = 378,148.64/x
  3. Step 3: Cross multiply
    619,904.48x = 855,440.16 × 378,148.64
  4. Step 4: Simplify right side
    619,904.48x = 323,483,533,105.38
  5. Step 5: Solve for x
    x = 323,483,533,105.38/619,904.48
  6. Step 6: Final answer
    x = 521,828.03

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Double scale
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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.