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Finding the Fourth Proportional to 648,420.60, 970,298.10 and 438,468.60

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Solution

The fourth proportional to 648,420.60, 970,298.10 and 438,468.60 is: 656,125.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,420.60 : 970,298.10 = 438,468.60 : x
  2. Step 2: Convert to fraction form
    648,420.60/970,298.10 = 438,468.60/x
  3. Step 3: Cross multiply
    648,420.60x = 970,298.10 × 438,468.60
  4. Step 4: Simplify right side
    648,420.60x = 425,445,249,489.66
  5. Step 5: Solve for x
    x = 425,445,249,489.66/648,420.60
  6. Step 6: Final answer
    x = 656,125.44

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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.