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Finding the Fourth Proportional to 656,730.60, 985,095.90 and 420,534.60

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Solution

The fourth proportional to 656,730.60, 985,095.90 and 420,534.60 is: 630,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,730.60 : 985,095.90 = 420,534.60 : x
  2. Step 2: Convert to fraction form
    656,730.60/985,095.90 = 420,534.60/x
  3. Step 3: Cross multiply
    656,730.60x = 985,095.90 × 420,534.60
  4. Step 4: Simplify right side
    656,730.60x = 414,266,910,268.14
  5. Step 5: Solve for x
    x = 414,266,910,268.14/656,730.60
  6. Step 6: Final answer
    x = 630,801.90

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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.