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Finding the Fourth Proportional to 421,381.60, 630,536.40 and 310,789.60

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Solution

The fourth proportional to 421,381.60, 630,536.40 and 310,789.60 is: 465,051.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,381.60 : 630,536.40 = 310,789.60 : x
  2. Step 2: Convert to fraction form
    421,381.60/630,536.40 = 310,789.60/x
  3. Step 3: Cross multiply
    421,381.60x = 630,536.40 × 310,789.60
  4. Step 4: Simplify right side
    421,381.60x = 195,964,155,541.44
  5. Step 5: Solve for x
    x = 195,964,155,541.44/421,381.60
  6. Step 6: Final answer
    x = 465,051.52

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1.5x scale

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.