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Finding the Fourth Proportional to 478,837.09, 716,137.89 and 425,900.76

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Solution

The fourth proportional to 478,837.09, 716,137.89 and 425,900.76 is: 636,967.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,837.09 : 716,137.89 = 425,900.76 : x
  2. Step 2: Convert to fraction form
    478,837.09/716,137.89 = 425,900.76/x
  3. Step 3: Cross multiply
    478,837.09x = 716,137.89 × 425,900.76
  4. Step 4: Simplify right side
    478,837.09x = 305,003,671,615.80
  5. Step 5: Solve for x
    x = 305,003,671,615.80/478,837.09
  6. Step 6: Final answer
    x = 636,967.52

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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.