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Finding the Fourth Proportional to 315,009.60, 442,257.60 and 315,009.60

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Solution

The fourth proportional to 315,009.60, 442,257.60 and 315,009.60 is: 442,257.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,009.60 : 442,257.60 = 315,009.60 : x
  2. Step 2: Convert to fraction form
    315,009.60/442,257.60 = 315,009.60/x
  3. Step 3: Cross multiply
    315,009.60x = 442,257.60 × 315,009.60
  4. Step 4: Simplify right side
    315,009.60x = 139,315,389,672.96
  5. Step 5: Solve for x
    x = 139,315,389,672.96/315,009.60
  6. Step 6: Final answer
    x = 442,257.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.