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Finding the Fourth Proportional to 438,009.60, 655,785.60 and 425,721.60

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Solution

The fourth proportional to 438,009.60, 655,785.60 and 425,721.60 is: 637,388.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,009.60 : 655,785.60 = 425,721.60 : x
  2. Step 2: Convert to fraction form
    438,009.60/655,785.60 = 425,721.60/x
  3. Step 3: Cross multiply
    438,009.60x = 655,785.60 × 425,721.60
  4. Step 4: Simplify right side
    438,009.60x = 279,182,094,888.96
  5. Step 5: Solve for x
    x = 279,182,094,888.96/438,009.60
  6. Step 6: Final answer
    x = 637,388.07

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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.