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Finding the Fourth Proportional to 310,290.68, 465,426.74 and 85,664.82

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Solution

The fourth proportional to 310,290.68, 465,426.74 and 85,664.82 is: 128,494.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,290.68 : 465,426.74 = 85,664.82 : x
  2. Step 2: Convert to fraction form
    310,290.68/465,426.74 = 85,664.82/x
  3. Step 3: Cross multiply
    310,290.68x = 465,426.74 × 85,664.82
  4. Step 4: Simplify right side
    310,290.68x = 39,870,697,905.29
  5. Step 5: Solve for x
    x = 39,870,697,905.29/310,290.68
  6. Step 6: Final answer
    x = 128,494.67

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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.