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Finding the Fourth Proportional to 478,973.40, 660,987.90 and 264,121.08

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Solution

The fourth proportional to 478,973.40, 660,987.90 and 264,121.08 is: 364,489.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,973.40 : 660,987.90 = 264,121.08 : x
  2. Step 2: Convert to fraction form
    478,973.40/660,987.90 = 264,121.08/x
  3. Step 3: Cross multiply
    478,973.40x = 660,987.90 × 264,121.08
  4. Step 4: Simplify right side
    478,973.40x = 174,580,838,014.93
  5. Step 5: Solve for x
    x = 174,580,838,014.93/478,973.40
  6. Step 6: Final answer
    x = 364,489.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.