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Finding the Fourth Proportional to 310,346.39, 465,518.97 and 85,706.25

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Solution

The fourth proportional to 310,346.39, 465,518.97 and 85,706.25 is: 128,559.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,346.39 : 465,518.97 = 85,706.25 : x
  2. Step 2: Convert to fraction form
    310,346.39/465,518.97 = 85,706.25/x
  3. Step 3: Cross multiply
    310,346.39x = 465,518.97 × 85,706.25
  4. Step 4: Simplify right side
    310,346.39x = 39,897,886,336.46
  5. Step 5: Solve for x
    x = 39,897,886,336.46/310,346.39
  6. Step 6: Final answer
    x = 128,559.21

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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.