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Finding the Fourth Proportional to 648,693.60, 970,707.60 and 438,741.60

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Solution

The fourth proportional to 648,693.60, 970,707.60 and 438,741.60 is: 656,534.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,693.60 : 970,707.60 = 438,741.60 : x
  2. Step 2: Convert to fraction form
    648,693.60/970,707.60 = 438,741.60/x
  3. Step 3: Cross multiply
    648,693.60x = 970,707.60 × 438,741.60
  4. Step 4: Simplify right side
    648,693.60x = 425,889,805,556.16
  5. Step 5: Solve for x
    x = 425,889,805,556.16/648,693.60
  6. Step 6: Final answer
    x = 656,534.62

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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.