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Finding the Fourth Proportional to 478,559.30, 717,161.64 and 265,421.02

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Solution

The fourth proportional to 478,559.30, 717,161.64 and 265,421.02 is: 397,755.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,559.30 : 717,161.64 = 265,421.02 : x
  2. Step 2: Convert to fraction form
    478,559.30/717,161.64 = 265,421.02/x
  3. Step 3: Cross multiply
    478,559.30x = 717,161.64 × 265,421.02
  4. Step 4: Simplify right side
    478,559.30x = 190,349,773,993.67
  5. Step 5: Solve for x
    x = 190,349,773,993.67/478,559.30
  6. Step 6: Final answer
    x = 397,755.88

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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.