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Finding the Fourth Proportional to 403,587.36, 604,447.92 and 389,590.56

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Solution

The fourth proportional to 403,587.36, 604,447.92 and 389,590.56 is: 583,485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,587.36 : 604,447.92 = 389,590.56 : x
  2. Step 2: Convert to fraction form
    403,587.36/604,447.92 = 389,590.56/x
  3. Step 3: Cross multiply
    403,587.36x = 604,447.92 × 389,590.56
  4. Step 4: Simplify right side
    403,587.36x = 235,487,203,643.64
  5. Step 5: Solve for x
    x = 235,487,203,643.64/403,587.36
  6. Step 6: Final answer
    x = 583,485.08

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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.