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Finding the Fourth Proportional to 491,641.60, 736,587.60 and 421,657.60

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Solution

The fourth proportional to 491,641.60, 736,587.60 and 421,657.60 is: 631,736.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,641.60 : 736,587.60 = 421,657.60 : x
  2. Step 2: Convert to fraction form
    491,641.60/736,587.60 = 421,657.60/x
  3. Step 3: Cross multiply
    491,641.60x = 736,587.60 × 421,657.60
  4. Step 4: Simplify right side
    491,641.60x = 310,587,759,605.76
  5. Step 5: Solve for x
    x = 310,587,759,605.76/491,641.60
  6. Step 6: Final answer
    x = 631,736.13

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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.