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Finding the Fourth Proportional to 315,420.81, 435,272.34 and 290,029.74

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Solution

The fourth proportional to 315,420.81, 435,272.34 and 290,029.74 is: 400,233.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,420.81 : 435,272.34 = 290,029.74 : x
  2. Step 2: Convert to fraction form
    315,420.81/435,272.34 = 290,029.74/x
  3. Step 3: Cross multiply
    315,420.81x = 435,272.34 × 290,029.74
  4. Step 4: Simplify right side
    315,420.81x = 126,241,923,599.39
  5. Step 5: Solve for x
    x = 126,241,923,599.39/315,420.81
  6. Step 6: Final answer
    x = 400,233.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.