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Finding the Fourth Proportional to 620,447.85, 856,544.56 and 417,565.33

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Solution

The fourth proportional to 620,447.85, 856,544.56 and 417,565.33 is: 576,459.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,447.85 : 856,544.56 = 417,565.33 : x
  2. Step 2: Convert to fraction form
    620,447.85/856,544.56 = 417,565.33/x
  3. Step 3: Cross multiply
    620,447.85x = 856,544.56 × 417,565.33
  4. Step 4: Simplify right side
    620,447.85x = 357,663,308,670.83
  5. Step 5: Solve for x
    x = 357,663,308,670.83/620,447.85
  6. Step 6: Final answer
    x = 576,459.91

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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.