Home / 678,802.40-1,018,203.60-398,175.20

Finding the Fourth Proportional to 678,802.40, 1,018,203.60 and 398,175.20

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Solution

The fourth proportional to 678,802.40, 1,018,203.60 and 398,175.20 is: 597,262.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,802.40 : 1,018,203.60 = 398,175.20 : x
  2. Step 2: Convert to fraction form
    678,802.40/1,018,203.60 = 398,175.20/x
  3. Step 3: Cross multiply
    678,802.40x = 1,018,203.60 × 398,175.20
  4. Step 4: Simplify right side
    678,802.40x = 405,423,422,070.72
  5. Step 5: Solve for x
    x = 405,423,422,070.72/678,802.40
  6. Step 6: Final answer
    x = 597,262.80

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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.