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Finding the Fourth Proportional to 358,978.40, 538,467.60 and 354,312.80

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Solution

The fourth proportional to 358,978.40, 538,467.60 and 354,312.80 is: 531,469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,978.40 : 538,467.60 = 354,312.80 : x
  2. Step 2: Convert to fraction form
    358,978.40/538,467.60 = 354,312.80/x
  3. Step 3: Cross multiply
    358,978.40x = 538,467.60 × 354,312.80
  4. Step 4: Simplify right side
    358,978.40x = 190,785,963,065.28
  5. Step 5: Solve for x
    x = 190,785,963,065.28/358,978.40
  6. Step 6: Final answer
    x = 531,469.20

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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.