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Finding the Fourth Proportional to 315,342.96, 473,135.40 and 128,511.60

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Solution

The fourth proportional to 315,342.96, 473,135.40 and 128,511.60 is: 192,816.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,342.96 : 473,135.40 = 128,511.60 : x
  2. Step 2: Convert to fraction form
    315,342.96/473,135.40 = 128,511.60/x
  3. Step 3: Cross multiply
    315,342.96x = 473,135.40 × 128,511.60
  4. Step 4: Simplify right side
    315,342.96x = 60,803,387,270.64
  5. Step 5: Solve for x
    x = 60,803,387,270.64/315,342.96
  6. Step 6: Final answer
    x = 192,816.69

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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.