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Finding the Fourth Proportional to 426,973.88, 640,459.98 and 400,992.32

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Solution

The fourth proportional to 426,973.88, 640,459.98 and 400,992.32 is: 601,487.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,973.88 : 640,459.98 = 400,992.32 : x
  2. Step 2: Convert to fraction form
    426,973.88/640,459.98 = 400,992.32/x
  3. Step 3: Cross multiply
    426,973.88x = 640,459.98 × 400,992.32
  4. Step 4: Simplify right side
    426,973.88x = 256,819,533,247.35
  5. Step 5: Solve for x
    x = 256,819,533,247.35/426,973.88
  6. Step 6: Final answer
    x = 601,487.69

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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.